My friend says she likes me but somethings off (girls only)?

ok so my friend has a boyfriend and they've been going out for about two weeks now. Well we used to have feelings for eachother and theyve been on and off since we dated which was about 4 months ago. I went over to her house alone a few days ago and we had the house to ourselves and we didnt really do anything serious, we didnt even kiss, we just had fun and cuddled a little. Well after, she texted me saying that when shes alone with me, she doubts her feelings for her boyfriend and all her feelings come rushing back to her. I thought wow this is a suprise so we started acting like we were gunna hook up, flirting almost all the time and all that love stuff you know how it goes. She said she was so confused about how she felt about me so i said we should just kiss. i mean i didnt think anything bad of it, it would help clarify her feelings for me and her boyfriend. So on saturday, her parents left for awhile and i rushed over and we hung out and i ended up feeling her up and making out and all that. She said she would let me take away her virginity and im thinking, well this is in the bag, shes mine again. So then i had to leave before the parents show and a few minutes later were texting again. She asked how i felt about her and i told her that i thought that what we had was re-ignited so to speak and that i really wanna be with her again. Now heres the thing. She said she liked me too. However, she said she liked me enough to tell me that she does, but not enough to break up with her boyfriend. And she said she meant everything she said even the part but im sitting there thinking what the hell is that? You like me enough to let me go all the way with you when you wont let your boyfriend, and yet you dont like me enough to dump him? how does that work? i mean for the boyfriends sake thats pretty sad that your girlfriend wants another guy to **** her but not you but she'll stay with you. That must make you feel great. And on both me and my friend, shes not being fair to any of us and im sitting her wondering what the hell she means by all this. Can anyone tell me what might be going through her mind? Im confused as hell right now.