<human>: My girlfriend [F15) is worried about my [M16] exes. We've been together for 9 months. We're in high school (two different schools, one all boys and one all girls) and she goes to school with my exes, and is one year younger than them. Every so often she gets really worried and depressed. She cant exactly explain why but it has to do with my exes. This has happened before and it usually passes. 

We definitely love each other, at least for a high school relationship, and I would never cheat on her. It makes her think about breaking up with me, but she really doesn't want to, as she has said. She already has anxiety and depression but this triggers it more than most thing. Please help. I'm desperate to fix his. Neither of us want to leave the other but shes so scared.

Can you summarize the given text in a few sentences?
<bot>: my girlfriends nebulously worried about my exes and it makes her want to break up sometimes, but neither of us want to.