Should I believe him?

There's not enough information here to help you much. . All I can say is, when a girl has the feeling that he is just trying to get in her pants, the majority of the time she is right.

First off, if you really think you can and will have a serious relationship with a man and NOT have sex be it once or hundreds, you are dreaming. But you haven't told us what YOU want. Do you want everything: dating, love, sex, possible marriage? Or do you just want a friend?

Secondly, your information is rather vague. How long have you been dating? What kind of dates have you been oh? How old are the two of you? And what your feelings are for him. Without this info, very difficult to answer your question.

Not every man will tell a woman he loves her even if it's just for sex.

How long have you two been together. If not very long, and he's saying I love you, then that should be a red flag. Either he has issues, or he just wants in your pants.

Two years is not a big deal, IMO.

Listen to your heart, since God gave it to you, it is always right.

Trust your instincts. If he is like most guys his age, he will say anything to get sex, and that's what is probably going on here. I agree with LostAndConfused -- your best bet is to hold out, and see if he sticks around. Good luck!

Its kind of hard to answer this question with out knowing if he is two older like you 18 and he is 20 or you are 19 and he is 21. The small gap btw teens and your early twenty's is a lot of maturing and dating experience you know more of what kinda of guy you want if you're gonna get jack around or not. Whatever you do just take what experience you got from this and learn from it.

Well first off how long have you guys been dating? Second, if you think he has alternative motives then the best way to test that is to hold out. If he sticks around then you know it's about you, if he leaves then you know that's all he wanted in the first place and you are better off.