if a man thinks sexually of a girl its natural. It is part of our function as human beings to think sexually about a girl that you like. To answer >>1 question, he isnt using you, he is just trying to mate with you, which is normal. It's so we can reproduce and continue to live as a species. Ofcourse he thinks sexually about you, and touching you is not only sexual but its a form of mating, which includes love. Meaning that he will love you while he mates with you.

but the mating process is not that simple, the girl will only surrender her body, (and her love) only if her instincts (whatever that may be) tell her that he is safe. In your case your instincts were that he wasnt safe, and you wernt comfortable with him. just try again next time, or wait till you meet someone you feel comfortable with. Your instincts are telling you that he isnt the one, and if you think too hardly about it you might make a wrong decision.