Hy.
First i would apologize for my bad english. i hope that you will understand all.
if you think that let go means that you must forget about your love, you missunderstod meaning of let go. You must think about your love, but you must thinking only on positive side of your love. Forget what happend before. What it was and what is going now is everthing what was creating in your past. Now you must create your future with your love.  
If you see his name everywhere that means that you are on correct way. You MUST practic LOA everday if you want fast and perfect resultat. For example, my story it will be present in my next post, but after i practice LOA and i ask for something that it will give me hope that i m doing right, i always get answer. Sometimes i see her name, i hear a music which is connect with her. Every day i get different evidence.
Dont forget about him, just forget and forgive him and yourself about your past. Allow that time past, because what you create in past, it must be done. After that what you creating now it will be in your future.
Make your self something what it will give you boost when you will losing faith. I have vision board, my journey and my friend who is in similar situation. But best thing in this journey it is that you know everething what it will happend, and you can tease people. I love doing this. It makes me happy. 

BE HAPPY NOW IF YOU WANT BE HAPPY TOMORROW.
BE GRATEFULL FOR EVERYTHING.
SHARE YOUR LOVE WITH ANYBODY. 
YOU CAN DO THIS. HE IS YOURS AND NOTHING CAN STOP YOU, ONLY YOU CAN PUT WALL BETWEEN YOU TWO. 
HAVE FAITH, AND BECOME YOU VERSION 2.0.

After two months i still have negative feelings. You must put your past in past, and start create your future. If you live your past you, cant create your future. What can you do to avoid negative feelings. start using visualisation. Make your visualisaton your own world. World where it is just you and your love. Think on that like a magic bubble, where all good things go inside the bubble and all negative things stay outside. Make your self a visionboard, with his picture where he is smileing. I did my vision board in power point and i put some lovely music in background. When i hear the songs from background on radio i start dreaming about visionboard. I see her picture where is soo lovely that it put smile on my face. I know it is difficulte but you can do it. One more advice, if you think about your past you didnt forgive yourself or him. Take your time with yourself, forgive him and yourself, put your past i past, make plan for future, and act like you already have all thing which are on plan. Enjoy yourself. In one movie, one person say: if you searching for happines outside of you, you are looking in wrong place. Have faith in LOA. He is already yours, belive this. You are winner in this battle.

My opinion is that:

1) you see the signs more than normally as you are letting go and that is the sign from the Unvierse that what you are doing is actually moving you closer to your desire - it is happening to me now too, I decided to let go on the 1st of Jan, hardly thought of him since then and I see the place where he lives written in each book i look, signs of places we visited together, his car is everywhere even that is not typical in here, etc. i think its just if you are on the path to the flower garden and as you are reaching the gate you start to see more and more beautiful flowers, like if they were paving the path for you to make a sign you are on the right way

2) that i also was feeling, like up and down till firstly i read somewhere and then understood that meant to be or not meant to be doesnt really exist, that is us who decides what is meant to be or not, so if you believe he is the one and stay in that believe that will happen, if you believe you are not meant to be together, that is another choice you are making and reality you are creating, also the negativity I think its your ego talking and trying to pull you to the save known places, but as i wrote in a post today i realized when i look at it like there are millions of different parallel realities and in each of that reality there is different version of him and also different version of him, they all exist now and all i am doing is just moving to that parallel reality i want to live in, then i feel more relaxed and calm as it means me and him are already happy together, married and having our baby - it is all happening now at the time i speak just in a different reality and for me to realize this reality on a conscious level i have to focus on that as much as possible, on that end result as that will move me there eventually where all that is already happening

at the same time i m ignoring this version of his where he doesnt want me and by ignoring that i am moving away from that and moving faster to the reality i do want to experience

all that i keep reminding myself anytime i would start to doubt or feel lack or sad

that makes perfect sense to me and it makes me feel good again and i can keep focusing on what i want again

i stopped visualizing but today i did two short feel it real sessions where he was cuddling me and as i am not attached to the end result it felt easy and nice

also i needed to make a decision today about some expenses and i thought ok so we are married he always advice me well plus how would i act if i was married to him and what would he tell me if i wanted to invest in this? and i heard things like baby, this looks good, its worth it, go for it and if anything i am here to help you and that felt very nice and so i went ahead feeling loved and supported :-)

thanks friends