Gay guy problems :( please help?

Heyy, ryt i know this guy called marc and he is in my math cl, he is like totally gorgeous, so obv i am gay, i love em to bits, but he like talks to both me and my friend (girl) all the time, and keeps asking if we are dating , then when i say no he smiles at me like he is happy about it, and he does not like my friend cos she is just not very good looking (soz emily but its tru lol) ,every time i walk by him he either says hi or like today he patted me on my shoulder and smiled, he has this sort of voice like, it has not broke but he is just putting it on, its sounds gay, i really like him but i don't know if he likes me back what should i do