Ah, that new car smell.
Enjoy it, it doesn't typically last forever. You're very physically attracted to him, and apparently you weren't with your past boyfriend(s). That's fantastic! Make sure to spend time getting to know eachother and bonding emotionally/intellectually as well and you two could have a fabulously happy future ahead of you!
Also, tell him! Tell him you are soooo attracted to him that you want to have sex all the time... and that you've never felt this way before. What a huge compliment! Tell him that you realize he won't always be up for it when you are and that's .O.K - make sure he knows it's okay for him to be honest with you if he isn't up for it.... and maybe if you're really horny and he's not up for a 2nd (or 3rd) time, he could use his hands, oral or you could use toys, etc... other fun ways to get you off!