Im a 18 year old female who is getting confused and led on by a 28 year old female. i dont know what to do!? :?

Hey. Im 18; and during a night out i met an older woman who is 28. We got on really well at the night, we made a connection. Problem is, she was with her g.f. Therefore, she said to me she wanted to kiss me badly so we snuck off to the toilets for a bit of the night, her g.f was annoyed at where she went but didnt suspect anything surprisingly probably because im soo young. Anyways, she said to me that she wants to meet me again for a drink, that she wants to take me home with her and kept telling me to make sure i add her on facebook. Therefore i did add her. But 5 days later and i still have no reply. I checked her facebook again and her facebook changed, it became more private so that ment she had been online. Im so confused and really hurt and upset. I've never felt like this before. The only other woman i fell for was my older p.e teacher. But this new woman i met was reality, but now it's stopped and i dont know what to do. Id give anything to spend time with her again. Ive sent her an email over facebook asking where i stand, but she hasnt replied. I sent it today, so i'l need to give it a few days to see if she has the decency to reply!