What goes in ur mind if a girl says to u that she feels so confortable around u n that u make her feel herself

here's the estory tough, she has a b/f, we hung several times... we even hook up, her b/f i was away for several months and i think that made their relationship a lil week,, i didn't mean it to be like that, but we both agreed that we couldn't help and she never regreted, there were times she'd feel guilty , specially when he got 1of my texts msgs, wich wasn't too much, just thinking of u stuff...,, n she kinda backed up a bit,, but we kept talking, theres more but is getting 2 long, bottom line is she found out that her b/f was also messing up with some girl, and she was very upset... she told me everyting n such such,, n i was like just being a friend.. listening 2 her, but now it looks like she's kinda ignoring me,,, acting a lil cold,, just dunno if its bc she's sad or bc she thinks it's my fault... she told me that she asked him a break 2 think things over... n just a day b4 we talked n she told how good she'd feel around me., im kinda confused now, wut would u do? wut u think?