Is it normal to like him?

My issue is that I don't know if im just confused. I like this guy I just met a bit ago beacuse we were working together in a big cast and I started developing a huge crush on him. I dont know him that well though, but I like him because hes really nice to me. Im normally a really quiet person and he doesnt seem to mind that much and he still tries to talk to me when he sees me most of the time. When people actually try it makes me happy. It really started bothering me when everyone went out though because I was sitting there waiting for my ride and since I lived a bit away it was going to take a while. My friends had already left and I was sitting at the table alone. He looked up and we talked for a few minutes and when the conversation ended he ended it with saying that I looked very nice that night. I guess I stared likeing him even more because I saw how polite he was then.

My point being im not sure if I should try to do anything and what I should even do if anything because I dont know if he even likes me back. Another thing is that we dont have any classes together but we are both in the same program even though we dont have the class at the same time. He comes in my class in the mornings sometime but we dont talk much then or ever since im really quiet. Hes also in a higher grade then I am but I am pretty sure we are about the same age.

Should I try and is it normal to like him even though I dont know him that well?

Sidenote: I really hope nobody that knows me sees this and figures out who it is.