<human>: Can you summarize the given text in a few sentences?

My Girlfriend  &  I were in a serious relationship,  We split up  about 3 weeks ago &  I've been hurting ever since.  She tells me she loves me,  and  wants to potentially be with me in the 2yrs. My girlfriend has anexity  &  had a  several bad sexual experiences when she was younger,  She slept with this guy who fingered her while we were in a relationship she cried during the finger bang but after we broke up  had sex with him multiple times after we split up. & hangouts with him.  I  keep trying to tell her he's bad news but she won't listen to me &  nobody in her family really will talk to her because she won't talk to them after childhood  experiences.. BASICALLY MOMS a bitch  &  she's been through a broken household.  I want her back soo bad. I'm  hurt  Idk what I should do..
<bot>: My gf cheated, I love her &  idk what to do she says I'm perfect but won't cut that guy off what should I do?