I know, it's kinda on the brain at least 12 times a day, right? It was the same for me and I was celibate for a year.
BUT if you make any first moves on her at this early stage, you are a gonner. She will backtrack and say you did it, it wasn't fair to while she 'vulnerable' etc etc and you'll lose your mysteriousness. If you become sexually available at this point, she will get comfortable in knowing you are there and the bad behaviour will start again.
Make her miss you and your sex. Remember, people want what they can't have. The more you with-hold, the more she will want you.
If she kisses you, it's fine to kiss back because she made the move, but I would really advise you to hold back on anything more serious than kissing FOR NOW, until the R is on a more secure footing.
Think of it this way, when my H and I finally got together, it was totally amazing. It was like he'd never touched me before in my life and I was going through the whole 'losing my virginity' thing all over again (which incidently, was brilliant the first time round), and judging by my H's responses, I know it was amazing for him also.
All good things come to those who wait - and just think what you will have to look forward to once you've made her earn the right to sleep with you!