Does she like me or is she just playing with me

Im 24 (girl) so is she. Neither of us accept that we could be gay, however she dated a girl for over a year. I have had
My share of Les encounters with one girl who I felt no attraction to. I have admitted that I might be bisexual, and she just smirks but keeps quiet. Now she is dating a very cute guy. But when she sends him photos in lingerie she sends them to me as well with the excuse that she needs help choosing the best one. If I dare come close she shuts out. She tends to look at me in a flirty way but I may be mistaken. I don't know what to think. She insists that her previous relationship with this girl was a mistake but then again she keeps contacting her as if she still had feelings for her. I only briefly kissed her once when we were drunk and nothing has ever happened again. I would never dare tell her how I feel and especially would hate to loose our friendship. Is it love or is it just a girl crush. Is she sending mixed signals? Or just likes the attention? HELP!