Back when my love and I were together, I used to get angry when other people made him laugh. But as I changed my vibration and started with LoA, I've been feeling a lot of love for him. A few weeks ago, he made everyone laugh, and I could see thath he was happy of making that impact on people. This used to get on my nerves, it was like looking for validation of others. BUT, that day I was terribly happy, because I was feeling what he was feeling. It was the purest form of love. I recomend that you try this, it feels amazing!!! 

Yessss. I had been there. And the only way out it's trough it. 
The thing is, what you want is to give love! i've read a quote that says that when you plant a seed of love, it is you that grows. and this is really everything. the unconditional love is the way, it makes us feel bigger, stronger and kinder. As you move on in your journey, you will realize that the main point is making yourself happy, and loving others it's a help for the soul. The bonus point  is that by the LOA, you will get that unconditional love back!!!
Take your jealousy as a practice. I started doing so and that's how I got rid of the negative thinking. get better everyday until you overcome the things that worry you. 
The more you love your self, the more you will realize that there is no point on being afraid of whom is he speaking to, because you are enough, and he/she knows that. it will just dissapear.
I recommend to you Ram Dass readings and meditantions. He is pure LOVE!!! 
https://soundcloud.com/ramdass/soma-guided-meditation-with-ram-dass 
This two are pure gold. but there are many more on youtube you can hear.
lots of luck!! and love, for us two being on the same path of becoming our best