Is he bi or straight?

You see i myself have recently come out of the closet. However, the main reason why i finally realized who i really am is because of this guy at my school. I have already taken a few steps by becoming friends with him. When we started hanging out he acted a little different than any of my other straight friends did. He's do things like spend 30 min on his hair, he'd always dress fashionable, make the whole direct eye contact deal and what not, plus he wasn't afraid to get up close like most straight guys do right. At first the one thing that was bothering me the most was my feelings for him, it was all fairly new to me and now they are even stronger than ever. However, my feelings were eating at me constantly so one day i came out and told him that I am gay, and he was rly accepting of that. Which was really nice, because I thought that he wouldn't be. Then he started to act a little but more flirty than usual. He'd make more flirty conversation with me as in; calling me stud all the time and little compliments to make me feel better. After a week of that i felt even worse, so i came out and told him that I am into him. He wasn't surprised. He told me that he already knew just like he knew how I was gay. After i finally came out in every possible way to him, he still acts flirty and sends me even more mixed signals. When i told him that i am into him, he was like "You know im straight right?" still a quite clear answer, but why didn't he say that he didn't feel the same way. Now that i have gotten through that i can explain how he acts well more gay than me. Firstly whenever we hangout now he makes alot of physical contact even after I have explained my feelings quite throughly. He does things like jokes about taking his pants off, feels me up, sings to the song where it says "Kiss me..Kiss me" and looks at me and smiles, also he has shown signs that he has been well turned on after lying on me, and isnt afraid to be in the same bed as me there are alot more examples but id be rambling if i did. So i am just asking for ur prespective on this because all my friends are like hes gay go for it, while i don't want to mistake feelings that may or may not be there for him just trying to make me feel comfortable.