Help me understand

A guy in my class told me that he liked me and i knew about it for awhile now. The thing is I'm not sure if i like him too. Most of the time, i wait for him to message me. I feel lonely at first but when he sends me a message that feeling goes away. I don't know I'm just attached to him or not. And whenever we pass each other in the hallway, i avoid looking at him, or something like that. I get awkward when we try to talk to each other alone. I also act weird; I try to look pretty around him which i usually don't do. I like that he likes me but i dunno about this

Do i really like him or im just attached, or maybe i just like being appreciated???