Sex is sex, but everyone is different. You said she was very "sexual" with you, well, why would she put that vibe out if not to cash in on it? The truth is, so long as you're both either underage or both overage then just do it. I know it sounds harsh coming from a girl, but I for one HATE HATE HATE games. I hate leading people on and I hate being led on. If the case was about you "Waiting" then she'd "wait" and be sexual around you later on.
I say you should play a game of hide the salami.