I'm torn up and want more from this guy, how do I go about it without scaring him?

You are not going to get this guy if you give in and have sex with him. If he is genuinely interest in you, loves you, then the lack of sex will not deter him from pursuing you. If all he is interested in is sex, then as soon as he gets tired of that with you, he's gone. While medical students are kept busy, it sounds like this guy is just looking for a little sexual relief. Falling "badly in love with him" doesn't mean you should start making bad decisions and mistakes. You need to sit down with this guy and tell him that you are interested in him, that you are falling in love with him and, you would like a serious relationship with him, but you have no intentions of having sex outside the marriage bed. You tell him that if he isn't interested in pursuing such a relationship with you, then he should tell you so now, to save both of you a bunch of trouble and heartache. I think he'll walk on you.You won't want to hear this but, from what little you've related in your question, it is extremely likely that this guy is only interested in having sex with you. This is no reflection on you, it's just where this guy's head is at. He's a medical student and has a long hard road ahead of himself to (I assume) becoming a doctor. Unless he's really rich, this is going to be a big financial strain on him and, I doubt he is looking for marriage anytime soon, as this would increase that burden. His behavior you describe, supports my position that he's only interested in sex. I wish you the best of luck.