<human>: Can you condense the text into three sentences or less?

So my friend[M/19, lets call him Bob] is in a terrible relationship with his girlfriend[F/19, Kate] Kate treats Bob like shit, she has said some nasty things to him like "I don't want to lose my virginity to you" "I why can't you be more like him" "Hey remember that time like just before we got together, I messed around with your best friend?" So yeah I don't like her too much. She's really bringing his self esteem down. He knows this as well, most of his really close friends do. He doesn't want to break up with her though, he says he wants her but she doesn't want him, which to me sounds like he really should let her go.

At the same time one of my other friends[F/19, Jane] recently broke up with her boyfriend[M/19, Jimmy] and now, Bob and Jane hang out at my house a lot now. They're both going though a rough patch i guess, Bobs upset hes relationship isn't going to work and he can't help it and Jane just broke up. Recently Bob and Kate have got really close, like a lot of hugging and holding hands, on the occasion they sleep in the same bed(fairly large bed though). I feel like Bob might do something he'll regret, like cheat on Kate, even though he should be breaking it off with her. I've talked to him about it a little bit and he said he couldn't cheat on Kate, but it seems like he will. Should I speak out more about this? I don't want it to get really awkward with them though. I don't really know what to do.
<bot>: Bob and Jane are getting really close, but Bob is still in a relationship with a terrible grilfriend. He might do something he'll regret.