How do I maintain enough control to stay a virgin?

I'm a 17-year-old girl and I just started dating this guy. My last relationship had been with a guy who was very shy and was afraid to hold hands. This guy is not like that, as he prefers constant contact of some sort via holding hands or whatever. While I'm not waiting until marriage to have sex, I definitely don't want to lose my virginity while in high school. However, this is rather difficult for two main reasons: 1) I find myself almost constantly aroused, especially around him, and 2) I am very sensitive, as in him rubbing my leg or arm just slightly puts me over the edge. Basically, I feel like I'm a sex addict without the actual sex. I seem to have the mind of a nympho and a body made up of nothing but erogenous zones... I honestly struggled while out with him because I just wanted to say "do me!" I understand that as a teenager there are a lot of hormones floating around making me go crazy and all, especially seeing as I seem to have high testosterone levels which increase sexual desire, but I just don't know what my problem is. I don't know how to keep it to myself when really, I don't want to deal with all of the problems sex brings in just yet. So what do I do to manage to keep it out of the equation?