moonjuice

You guys are always here for me so I got a problem I need advice in.
So about a week ago I started talking to this girl.
She's pretty cute and fun to be around but there was one thing she hadn't told me.
She had a boyfriend.
When I found out, naturally I backed off a little.
A couple days ago, I'd say 3, she broke up with him and she told him it was because of me.
Now the guy wants to beat my ass and I just want to stop talking to this girls but there's too much going on.
She told me her dad walked out on her family.
Her step dad is a drunk compulsive gambler and her mother has cancer and is slowly dying.
When I told her we needed to stop talking she started crying and I didn't have the heart to hang up.
She's been telling me she's never met anyone like me and she wants a relationship but I'm not trying to get my ass kicked by the ex and his friends (who paid me a nice threatening visit today).

Oh man.
What do I do?