I really like one of my flatmates at uni but theres a problem

I started uni 4 weeks ago and there is this girl in my flat that I really like. We got talking half way through freshers week and we have a lot in common. She is currently going through some issues that I went through in the past so I am offering her support whenever she needs to and am trying to cheer up. We get on really well. I would have already asked her out by now but she has a boyfriend. She genuinely does seem at her happiest when shes with me and when her boyfriend texts then alot of the time she will complain.

She was on the phone to him last week when I was there and told him she was going to watch a film but when she was going to say it was just he and me, she stopped before my name and changed the subject. Does this sound like she might like me? She complains about him a lot and he has made a lot of awful comments towards her that don't help her at all considering all the issues she is going through. However some of the time she seems to really like him despite how bad he can make her feel so I don't know what to do.

She has told him how the comments make her feel but he just apologises and then continues to make the comments. I asked her why she was with him if he makes her feel awful but she just said that he isn't like that all of the time. Does anyone have any advice on what I should do?

Fuk her boyfriend. Get her in bed then when you hitting it from behind take a photo, send him the pic and text him saying
"Sorry man she was busy".