PLEASE HELP! so theres a guy I like?

So I have a friend we talk a lot and we share a lot of things with each other. Sometimes he's really fun to talk to and we laugh a lot, but then sometimes its one word texts and its really boring. It seems like he gets board sometimes then other times we have a really good time. He is really flirty but he also flirts with some girls too. He's super oblivious so he can't even see that I like him. I am 14 and need tips on how to get him to pay more attention to me. Tips to get his attention.