<human>: Of course I'm young so my issues may seem more insignificant but I'd still like advice on this. I originally dated this girl in 9th grade for a long time and ended, then we just started hooking up our senior year of high school, which lasted 2 months. We then ended somewhat recently and we've been kind of on/off since. The second time we got back together this year, we hung out all night although didn't tell me until hours later that she had sex with her ex like a week after we ended. We weren't exclusive when it happened but still... it hurt; after hearing that we stopped. Recently she actually has been hooking up with my teammate from school which has also been rough yet she has told me she loves me and doesn't want to hurt me. We hooked up once again last week and ended shortly after, but this time it seemed more permanent (lol probably doesn't seem that way to you guys/girls). Anyways... do you think I'm being immature by not getting over the sex with the ex-boyfriend so quickly after we first ended, or how she's treated me by hooking up with people i'm close to or at times when she probably realized it would hurt. She says she only cares about me but I really don't trust her that much anymore. To be honest, I've been really torn up about everything and she has really hurt me, especially since I had very strong feelings for her, that I still somewhat have. I've never been this hurt by a girl before and it's been difficult. Do you think I should forgive her and be with her or just try to move on. We both are going to college though in August far from each other and wouldn't stay together for that either, it's just a matter of the next few months. Pretty much all of my friends think i should end it and move on as i deserve better but who knows. What do you all think? Thanks

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: On/off with girl, she hooked up with ex and people that were close to me (when off). torn up and hurt by her. should i forgive her or not?