How do I let him know that I might want sex?

I met this guy 4 weeks ago at boarding school for sports. We see each other everyday and eat every meal together. We instantly hit it off and a few days later he kissed me. Since then we're now boyfriend and girlfriend and we're falling in love with each other. I'm 16 and a virgin. He's 17 and I'm not sure if he is. I really really like him and want to hint that I'd like to try or explore. He's very mature for his age and looks like 21 or 22 even. I really think that he's incredibly different from all the others guys, and I want him to be the first one. How do I let him know (without telling him or appearing slutty) that I want to?