How to tell if this boy likes me?

Well when me and this guy first started high school there was a big rumor that he “liked me”. And I could really see that he did, he would talk to me and all that…but then a girl who i (kinda) talked with asked him out for me (without asking me if she could). The guy had said yes but i didn’t know she had asked him until a few days later. I wanted to tell him it was a mistake and all but things had gotten way to awkward. After a few weeks later we started talking again and then i ended asking him out myself…he said he didn’t know, and i walked away. The days after that he did try to talk to me but i couldn’t help but to avoid him because i didn’t know how to talk to him. Then we really stopped talking for a long time…but we would still look at each other and talk once and a while. Then I found out that he had a gf, and yeah i was bothered by it because i still felt like me and him still “had” something. He would ask me “Why” i was mad at him and why i wouldn’t talk to him…so i got really pissed of that he was rubbing it in my face so i really stopped talking to him. After a few months while i was at lunch and he was sitting with his friends and he was whispering something in one of his friends ear, and she the screamed out loud that he liked me (i guess that was his way of telling me he was single again). I still mad over the gf matter didn’t pay much attention to it (also being interested in someone else at the time). Then last month was his birthday, have gotten over the whole gf thing now…I realized i still liked him and got him something and i (eventually) give it to him. Since then we do talk to each other everyone in a while…but i don’t know if he still has the same feelings I do for him, I know the easiest way would be to just ask him but i don’t want to ask him until I’m sure if he does or not. I also don’t know how to get with him anymore or how to really talk to him. (He still looks at me when we are at school and smiles at lot when i past him…) What to you all think?? Sorry i wrote to much…