I Don't Know Why I Like Him ): ?

I like this guy, and he's pretty much exactly the opposite of me. He's not a virgin, I am. He smokes, I don't. He's tall, I'm short. But at the same time, we have alot of the same interests and all, and he's really nice and funny and sweet and all. I don't know why I like him, but I just do. He's not one of those bad guys or anything, and I know he's not obvious about the fact that he smokes or anything. I try not to like him or anything but everytime I do, I just come back liking him more. I don't know what to do I talk to him ALOT (3-5 hours everyday for about 2 months now).. He's like, the only person I really trust anymore, but yeah, I'm not going to go into a big story of why I don't trust most people. Anyways.. What should I do? I have no idea what to do.. :'(

Suggestion:

i dont see whats your problem?
if u are asking why do u like him, i can tell u, love is blind.
there 101 reasons why someone can just love another person of a total different personality.
when asked to name out the reasons, one can only say "i don't know either. i just like him/her"
if u really do like him, go for it. like u say, he's not a bad person.
1st, smoking doesnt make 1 person bad. it's just a bad habit that can be kicked.
2nd, hes not a virgin. in this generation, who is?! (im not saying that u're the extinct species, its just that not being a virgin is like a very common thing)
i believe there might be some other factors that u did not mention here that stops u from liking him. if these are the only factors, i really see no issue in liking this guy.
also, last question, does he know about how much u like him? does he like u too?