please help im falling for one of me mates ex gf?

[Steve]

well ive just got in from a night out and i saw my mates ex girl friends and she approached me (im 20 by the way) and she asked how i was doing and that and she then felt my body and said your really tanked up aint ya and she winked at me (i work out 4 times a week) and she started asking me questions about myself that was personal and that i didnt tell her much apart from what i do for a living and where i live ( i live with me grandma ,my dads mom) and that so her mate come over and she was chatting with her mate my mates ex who im falling for and she whispererd to me dont say anything i saw me mate and her chatting earlier so after that mates ex said im going now but before i go she asked me why did my mate blank her earlier in the nite as far from what i know my mates ex cheated on him but she said it was a load of crap after i asked i just told her straight i dont want to know about you and my mates past she then said thats good then ok see ya later am i getting the wrtong impression cause im really falling for her and she seems to be in to me and about her mate i aint gonna say anything cause is it true i will cause a disagreement please help