I'm going to link an Ask Teal video on the law of attraction clips part but for those who may not watch it, I'm just going to summarize what she said, it's something that I feel we all here in this community should think about. It's true we create our own reality, however, we are not always meant to have direct control over our reality at all times. We create what we want with the desires we set out, the general desires, such as the desire for love, freedom, self expression, creativity and we all have slightly different main desires. For some people, the desire for creativity will be stronger than the desire for love and for some who think they have a desire for love, they might actually have a desire for safety or stability. Our inner being or higher self is more aware of our desires than we are at times, which is why we might feel negative emotion in a situation that we would have thought was positive from our lower perspective selves-such as feeling negative emotion during an engagement when we thought all we wanted our whole lives was to get married or negative emotion in a relationship with a person we think is the only one we want to be with for the rest of our lives. Sometimes we ignore our negative emotion until it eventually gets buried inside of us and we become stunted and dead inside, think of all the people who are in top jobs who drink every day after work or the wives and husbands who bury their true selves and then lose intimacy, creating tension, fighting or just general unhappiness. We spend so much of our lives striving for the things we think we want, in the case of this forum, a relationship with a specific person and sometimes it feels as though there is a lot of blame and shame going around for why we lost that person or why that person isn't around us yet or why they're getting married to someone else and not us and if we were just in perfect alignment, it would be us, therefore it's our fault that this thing that 'shouldn't' be happening is happening. 
Well what if.....we stopped that. What if we stopped for a second and thought, maybe this 'terrible' thing (which we are perceiving to be terrible just because it is unwanted) is meant to happen? Maybe it's meant to happen because we work in accordance to the laws of the universe and what our higher self wants, it reaches out and gets for us and sometimes that doesn't appear to be what we want at all. Because we can't see the full picture, we can only see what's happening now, it's hard to understand where this 'bad' situation might fit in.
First thing I believe we have to do is to stop looking at the situation as 'bad' because that only adds resistance to the situation, causing more of it! We have to accept what is happening and then start to see how we might have attracted the experience into our lives and how the experience might actually be beneficial for us. It's not our fault a lot of the time about what we attract so placing blame and saying 'you brought this break up or this disease or this thing into your life because you weren't in alignment or you weren't doing the best or being the best you can be' is ridiculous. Also to say that this thing 'shouldn't' be happening isn't helpful either.
If you take a look back on your life, you will see times where you thought that everything was so 'wrong' but then, something greater came out of it. It's only if you stay stuck in the 'this shouldn't be happening' or 'what's wrong with me, I've done everything they said to do and I'm not getting the thing I wanted' that there's a chance that the 'thing' you wanted isn't what you want at all. The 'thing' you wanted is an excuse for you to hinder yourself from progressing along in your life and accomplishing the goals you want, if that's love, marriage, children or maybe it's travelling, exploring, learning...the 'thing' you wanted might also just be an outcome of your fears of change or losing control. There might also be so many underlying reasons for why you attract what you attract that might take time to truly discover and heal but there also might be reasons like, you attracted the end of this relationship because you want something greater like: you want to spend time alone to understand yourself as a person and to enlighten yourself, you want someone who can connect with you on a deeper level and this person never really got to that level properly, you want to marry someone who makes you feel a certain way and this person gave you that feeling but not enough or maybe you need something more but you haven't quite understood what it is yet. It's not because you weren't doing a good enough job, you were just being who you were being and feeling what the vibration of you and your relationship caused you to feel.
Some people might say that it's your fault for feeling insecure, but honestly, no child was born insecure, somewhere along the way, something hindered your confidence and if you were feeling insecure with this recent person, either they did something to hinder your confidence, or if you came into insecure, they definitely didn't help to ease that feeling in you. So you'll either grow more confident in yourself after feeling happy alone or doing other work, or you might just meet someone who from the get go, eases your fears and you never worry about that feeling too much again because they just fit right.
Also, self love is definitely important, but it's ok to not be feeling so good about yourself at some specific times and don't beat yourself up if you're feeling that either. If you're down and in a low vibration, don't think 'ugh I can't even get up to a high vibration but everyone else seems to, I'm just a failure'. The key is self compassion, not self pity, and just taking baby steps and forgiving yourself. Also allowing yourself to think that what is happening, is what should be happening, because it is happening. Accepting reality that way and then thinking ....what is happening, should be happening because it is happening AND will lead to more self-discovery and then happiness if I let it. Also, creating reality is not the same as controlling reality. You create love, you can't control a person to propose to you (but you can influence them if they are in your vibrational range and if things are manifesting downstream that way). What you want in your conscious mind, might not be what your higher self wants and your higher self or true self ultimately knows what will make you happy if you can just tap into it.
Sometimes I think back on the  year I desperately wanted a certain boy back and at that time started casually sleeping with someone else just as a way to get a certain type of revenge or distraction. After 4 months, I started really falling for the boy I was sleeping with because I finally started letting go of the previous one and letting the new one in and the new one ended up becoming my first love. When I look back I just think, 'Thank God I never went back to the first person, I would have missed out on the greatest adventure of my life so far' because my relationship with the boy I fell in love with was so different and so much better and so much more adventurous than the first one! In fact, it was everything I had ever wanted at that stage, it was more than I could have even imagined and I very nearly stopped that all from ever happening by wanting to go back to the first boy who I would have been so bored with after a short while, or at least, never have been fully happy with ever. Food for thought for anyone who is also afraid of entertaining the idea of being open to someone else.

 If you do get stuck on the reality you're experiencing as only purely negative, you will never allow yourself to be happy. If you get stuck on the idea of the thing you want being the only possible outcome on the planet that can give you any meaning in life and contains your only joy and happiness and if it doesn't transpire you will end up being miserable and living in a lonely hell and die alone and totally miserable .....then you will also never allow yourself to be happy (you will create that reality even!). Being happy is a choice too. Not 'happy' as in that fake chocolate box, Disneyland happy where you go around forcing yourself to smile all day and watch videos of puppies and pretending you're all joyful when inside you're completely drained and broken, because  that's not authentic happiness. Letting yourself slowly rediscover what would make your life worth living and give you a sense of purpose so that every day you can genuinely go to sleep with a small smile inside your heart and a natural positive feeling inside of you that isn't always extreme, but isn't fragile either.

To sum up: Blaming and shaming yourself for causing what you perceive as a negative current reality is ridiculous. That's a negative spiral just waiting to happen. Blaming yourself for feeling low about something painful like a break up or thinking you can't feel sad about a break up because it might destroy your chances of a reconciliation-is ridiculous and unhealthy and will drive you insane because you won't be healing, you'll just be running on fumes, forcing positivity for the hope of getting them back, which won't work and will probably lead to the worst depression of your life. Allowing yourself to just live in each moment and start to make your life a life you enjoy as much as possible and building up from there and accepting reality and having faith that if you allow yourself to try to be happy at first, you will stumble across things that will just take you there without effort but there's no rush and it's ok to feel sad too.