Don't worry about it so much. I dated the same guy from the end of my junior year to the middle of my freshman year in college, and it was not a good idea--I should have been out at the movies with my friends and getting to know a lot of different guys instead of sitting at home until my boyfriend got off work. Why not start out by just being his buddy, and then if something more starts to progress, well...then you'll have a good friend and a boyfriend.
But I still think you should be out flirting with several different guys.
If I had taken my own advice, I wouldn't be sitting here waiting for my boyfriend (who's two hours late) to pick me up for my date party.