<human>: Can you condense the text into a few key points?

I don't know what to do. My first relationship lasted 2 years, my previous one 4 years. Both girls cheated on me. Now I'm in a new relationship of 2 years. I'm incredibly jealous, insecure and starting to have controlling tendencies. I'm finding it difficult to trust my current girlfriend with other men. I know I shouldn't project anything on her from my past relationships. But it's hard not to. 

There's so much anxiety when she is out and about with friends. It's crippling. It's making me sick. I feel like I'm not ready to be in a relationship because of my fears. I've been in therapy with 2 different psychologists to sort out my insecurities, but it didn't make it easier to deal with. 

I told my girlfriend that I am overly insecure. That it's really hard for me to get past it. She understands, she tries to support wherever she can, but it's terrifying.
<bot>: Should I give up someone who I am crazy in love with, just because I'm too insecure? Is that the right thing to do for the both of us?