I'm a girl that likes a girl but she has a boyfriend, yet she flirts with me all the time, help

I've had a crush on this girl for the 3 years I've known her. We've become extremely close over the last few years, we talk about almost everything (except my feelings for her which she doesn't know about). we buy each other lunch, go for long walks do most of the stuff you'd expect in a relationship, apart from the relationship bit. Yet she has a boyfriend. He treats her like crap, and has had several major stuff ups regarding other girls. I'm always telling her she deserves so much better, someone that could treat her with the respect she deserves.
Yet I always find myself patching up there relationship, telling her everything is going to be ok, yet I always feel happy when they have arguments.
When ever I'm with her (even in front of him) she constantly flirts & hits on me. I get kinda nervous about it, cause I don't wanna cause shit in there relationship.
I've come out to a couple of my friends.
some of my family (of whom are extremely homophobic)
We've kissed before. she has said (once in front of me) and to a friend of mine that shed "swap teams" for me... We tell each other we love one another, and she kisses me on the cheek now and then,
The thing is, I don't know if she's screwing with me, or if she feels the same way I feel about her... What should I do ?
Thanks

about the family issue they will love you no matter what, although sometimes it does take a bit of time for them to come around but bottom line they love you for you and not for someone you would pretend to be. For your friend I would advise maybe talking to another close friend who knows the girl you like and ask her if she feels that kind of vibe of the flirting and stuff. Then talk to the girl you like and the worst case scenario could only be you guys being friends

This was posted a few months ago so I don't know if you're still having this problem or not. I was in the same exact thing. I ended up leaving my boyfriend for a girl who held onto me for months. She had a shity boyfriend that she refused to leave, I would always patch up their relationship. It got to the point where I was miserable and I decided that I was being used. I'm everything she wanted but I was missing the one thing she needed... and sadly you have to be a man for that -_-. If you love someone you'll be with them. She probably does care and love you, and you probably are everything she wants...if you were a man she'd have you in a heartbeat. (Mine would tell me that all the time. She even said to her friends that she'd totally switch sides and be with me) But it never happened... I would also use your time to find someone who will be with you no matter what and not use you. Since this was a question a few months ago, I hope things progressed and you're either with her or moved on and are no longer in this very frustrating painful situation. :] Best of luck to you.