Ill try keep it short:

Meet HB8, she is a big tease, clearly some attraction, night ends with us both at a mutual friends house, end up kissing, touching each other, but it ends there - she feels a bit guilty as she has a boyfriend in another country, but they are not together properly cos of the distance. Although she still feels like she is cheating on him bla bla which I think is fair enough as I also have a long distance on-off girlfriend.

Anyway next time I see her I ask her to come out (so we can finish off what we started...neither of us is looking for anything serious) but she makes excuses and says she is going to x country in 2 weeks (where her bf also lives) and we can meet after that. At this point I KNOW shes goin there to find out what the deal is between them 2, and then decide whether to see me or not.

Anyway fast forward a few weeks and she tells me she is with her boyfriend properly now; to be expected, they have known each other for ever bla bla.

NOW, I think I should just cut off all contact with her, as if we didnt do anything that night when we were kissing etc, she surely wont let me get into her knickers now they are back together. I dont want to go on the 'friends' list, I jus wanna keep my distance, and if for whatever reason they break up, I can try again to get her into bed.

Thing is she seems to be initiating contact with me, but just talking about trivial non-important stuff, at the same time telling me how wonderful her BF is.

Do I TOTALLY ignore her?

Im not too bothered about her as I can meet other girls, but I do want to keep her as an option later down the line, as im 100% going to be seeing her over the next few months at social gatherings etc.

Thanks!