What mental issue do i have if i am in love and take crap from a gf that has borderline personality disorder?

My gf has bad mood swings,super jealous and insecure,throws fits, I have to walk on egg shells all the time with what I say,constantly breaks up with me then later asks for me back,gets violent,gets loud,is antisocial, has had history of cutting herself, and seems to have issues with depression at times.I think a normal sane person would runnnnnnnn far away from a situation like this but for some reason I can't let go.I'm in love with her, I hate the bad crazy times but love the good times