So I was chatting on FB to a girl (HB8) I know the other night; to add detail, we nearly ended up going out in the past, but I screwed it up by being too aggressive in sealing the deal. After that, I didn't speak to her for ages, and didn't think of her too much. However, I got into a really, really deep conversation with her other other night on FB, it felt natural because I was using PUA techniques as a very small part of what was a very natural conversation. Had a long conversation about how sweet it is when people get together young and stay together forever. She also revealed a lot of insecurities to me about how people used to call her ugly and stuff, and how she never got attention at school, while all her friends did. And, something which I think was a key test, was that I admitted to her that my original excuse to talk to her was bullshit.

Particular quotes from her included:
"You speak like a prophet! Haha, nah seriously I think this is the most in depth conversation I've ever had over social media"

"Well I'm glad I've made an impression on someone haha, you've actually made me feel like I matter. Not a thing I've always felt. A lot of the people in halls are like 20 and one of them couldn't believe I was only 18 with how I act sometimes haha
Although I do have weird quirks though and tell terrible jokes which I think are funny"

If it had been normal term-time, I would have gone for it straight away there, but the fact is that I'm back in our uni town, but she won't be back from her home town (over 100 miles away) until about the 9th February. How do I maintain what I think was attraction over a 3-week period, despite the fact that I physically won't see her for another 3 weeks?