
Originally Posted by
kuronosan
Unfortunately the only thing you can do is just tell her you're there for her and move on, continuing to be her friend when you feel necessary. Don't try and convince her to leave her boyfriend, don't try and paint yourself as a better option, just leave her be. If she brings up her boyfriend again, just be as tactful as possible and tell her that you don't want to hear her complain about her boyfriend anymore. When she asks why, either tell her the truth (that you really don't want her to tell you problems about a guy she's staying with) or lie to her (that you don't want to hear about it anymore).
Either way, her body language is clear. If she wanted you, she'd have broken up with him. What she's doing is building a rapport with you and seeing if you're somebody worth 'jumping' to. If you're not, she'll find someone else. Until she does, she's going to stay with him no matter what she says about him. That's how some women are, unfortunately.