Im a tomboy and im going on my first date...help?

well im a sophomore in high school and im going on my first real date. im scared about a few things. I hang out with dudes,i have a few girl friends but i don't hang with them on the weekends like i do with the dudes. I have been asked out by one of my friends friend and i have no idea what to do. i said yes but now i scared because i am rats,snails and a puppy dog tail. i know how to act correctly around people, so don't worry about telling me how to eat at the table. I listen to mostly rock, like AC-DC,pixes,garbage. the girls and boys at my HS are scared of me, I only wear dresses on rare occasions, i fight dudes and girls without a problem.I love to play and watch sports. i love music,i sing and play the guitar, so i guess what im getting at is..what do i do? i only know how to be a friend, not a girlfriend. The guy is nice he plays the bass and a sport. He bought me two large pizza and we ate them together,while watching the playoffs. Im not use to guys looking at me as a girl they want to date. Don't get me wrong, i have been told i look cute and i have a curvy body with nice boobsDD[ which resulted in them getting their lights knocked out] but a compliment is a compliment, i digress. i just need to know what to do,feel or something that will help me be myself around him and not a nervous, awkward girl. also i need date ideas, i dont want a something that will have us silent the whole time. I need something fun that we will both enjoy and take our mind off that its a date and anouther thing im not wearing make-up or anything girly, if he thought i was cute without that crap then he should when he go out.