Question to OT about an old flame

No pics.

Story goes: In college I met a girl and we hit it off. Hooked up a couple times, and there was genuinely something there, as we both openly liked one another,but then summer hit and school was let out. We sparsely spoke during the summer, but then she went aboard with one of my really good friends.

They end up hooking up abroad in Prague, to much of my sadness, but my buddy straight up confessed to it and told me right after it happened. I asked him if it was just a one time thing, and he said yeah and that it was unlikely to happen again.

Well it happened again, they hooked up and it kinda tore at me but I respect him as a friend and man for telling me, and they both ended up genuinely loving one another. Theyve been dating ever since, and I believe (im not sure) that I was the last guy she liked before her to be husband. They are both great people and they are now (8 years later) engaged. It took me sometime to get over it back in college, but I eventually did and I see it now as something that happened for the best. I am happy for them (people make mistakes. its how you deal with it), and hes actually someone I go to for my own current relationship advice.

Well I mention this because back when I was a dick in college, we were all out drunk once, and the gal and I were talking, and I asked her if she had a chance to go back, would she have liked to have officially dated me, and she said yes, with no hesitation. I actually went on to date one of her friends, but I never got her seal of affirmation for that relationship. Which brings me to this.

So ive caught her gazing at me a couple of times in the years after our ordeal, and after we all moved on maturely. Sometimes when we have conversations her body language is more friendly than it is with other people, but she is flirtous by nature. Its nothing overtly direct, but we also have a history of (un)finished business. I do feel uncomfortable speaking to her at times as I dont want an suppressed feelings I may have for her (I dont know of any) to arise and become apparent. She'll send me direct snapchats alot, none of which are sexual or anything. Just her out and about with my good buddy. I hardly send any to her, but she always sends them to me.

Is there a possibility that there is something still there (I have moved on and have a great little deal now and dont wish to go back in time)? Has this happened to anyone else? Does she just consider me to be a good friend? I feel like had college not let out for the summer that year, things may have been different, at least for the rest of our college experience together.