Why do I do this?

As a child I was told not to trust anyone. I was told you can’t trust the people you love, they will hurt you more than someone you don’t love. Because you love them so much, when they do betrayed you that heartbreak is the worst in the world. Betrayal. 

I feel betrayal constantly 

Why is that? I wish I knew the answer. The littlest things set me off. Things I can’t control that I get upset about I feel betrayed. Betrayed because he looked at the women in the little dress or the women in the tight jeans. Tighter than mine. Better than mine. Better than me. Betrayed because I think he doesn’t want me. How do I stop those thoughts? Is it really me with my insecurity or do I need to get out?