Oh my God, little annoying British girl. How about stay the hell away from my boyfriend?

I'm sorry I have my insecurities, but I have them for a reason. I was hurt before, and for some reason I cannot completely let my guard down. I'm working on it, I promise. But until then, tell me if you really enjoy this girl going after you. Why bother trying to be friends with her, when she leaves her goddamned wallet in your car, just so she has another opportunity to see you again. I'm in love with you, and even I'm not stupid enough to do that. Have a little dignity, my dear.

Why does this bother me? I feel hopeless. What do I do?