I know this talk is basicly dead, but I had a similar problem about 4 years ago. You should be glad nothing did happen between you guys, because the way you described your feelings toward her it didn't sound like love at all, it sounds like you had a feeling of lust towards her & you were trying to mentally tell yourself that you love her because you do like her as a friend & you didn't want to hurt her, its almost like if you go to a "club" & meet a girl there & you're going to go home with her for the night but have no intention of calling her (almost all of us have done it atleast once in our lives) because frankly you don't know her like a friend but you find her sexy or slutty (it can be a turn on on some girls) and you want to hit that (lol) but if a guy knows the girl and that guy cares for her as a friend he is very hesitant to just go sleep with her and not care because he doesn't want to hurt the girl but he finds her as a turn on to him, that's what your preticamemt sounds like and it happens a lot more then you think, so guys just try to basicly mentally fool themselves into thinking they're in love to make themselves feel like its not wrong to have these feelings of lust towards a friend. Now if it was love then her past wouldn't have even been brought up in your queston because if you had "fallin' in love" then her past wouldn't be a problem, everyone has a past some worse then others, and if you had fallin in love then you would have found a way to look past her past & love her for who she is outside of being a 'slut' & her good qualities, because I have to believe she had other qualities other then being a slut [her other qualities(her good qualities),you really didn't focus on when writing your queston which would be an other reason it probably wasn't love]. Its perfectly normal to end up having lust towards a 'friend' of yours but if its just that and you can't look past her past and you had to keep asking yourself if you should go after her and if its right to have these feelings toward her because of her past, because of her bf, & because she said you were like a brother to her then odds are you just wanted to get in her pants (I know that sounds rude & I honestly don't mean to sound rude) & that's why you asked if it would be ok to go after her because you need people to give you opinons to help you mentally trick yourself. 1st If she had a bf & you did love her then her bf shouldn't even matter to you I know you didn't want to feel like you're imposing on her relationship but if you love someone you can't have anyone or thing hold you back and by that I mean the relationship, her relationship with him sounds like a fling anyways. 2nd if she said that you were like a brother to her it ment she really cares for you it doesn't mean she wouldn't persue a relationship w/you. 3rd my final reason I feel this isn't love is the fact that an other thing you focused on was the fact that she talked dirty to her ex, got naked on a webcam,that you went on to say how good she looks, and that you said that you wanted to fuck her, now in my case I'm a relitively young guy (I just turned 23 two days ago may 16)so I know a lot of people well say I'm to young to be in love but here's a quick summary of my story I always had a feeling towards a bestfriend of mine and I didn't want to fuck her I just felt like I don't know I just felt like more of a feeling for her then just friendship I guess you'd say I wanted to make her mine and I wanted to be the one she talks to about any little thing that happened at her work or school I want to hear each and every detail that she wanted to give me I want to be the first (& hopefully only)one she comes to for comfort I wanted to be the one she talks to her girlfriends about (good stuff about me not bad) I just got along with her so well she gets me and I get her its like we were ment to be (I know this all sounds gay but I don't care) I'm currently her boyfriend & we've been going out now for 3 years I know that's not much but I feel like she's 'the one' (I know that sounds gay too) so all I'm saying is I'm not an expert on love but it definatly didn't sound like love. P.s. Sorry for the really really long message I just wanted to make my point clear and I wanted to show you my reasons for my opinon now wheather you take them to heart or not its up to you but think rationally about your whole problem you'll see some valid points to my theory hope this helps sorry if I offend you.