Does he like me more than a friend?

I have a really close guy friend I have acquired recently. He's nice and fun and we both really enjoy each others company. Now see originally he was a friends of mine brother..but by accident we just starting talking and waaa-laa! bffs ! lol , now sometimes I wonder if he likes me slightly...he has a girlfriend but he has told me Im very pretty and he hates when I don't give him a hug every time I see him Or like how we text all day and talk on the phone all night like to 3,4, 5 am. I think he is just a really good friend. But is there a possibility that it could be something more than I realize? Does he like me...even though he is dating someone else??? Help@ I just want to figure this all out...