He IS MESSING ME ABOUT!!!?

[Lucy]

There is a guy who I kind of like and he talks to me all the time, he flirts with me on facebook asking me who I think is hot in our year and who I would like to be my guy best friend and popps up to me almost everyday. He never talks to me at school like ever! he doesn't even look at me. On facebook we got talking and he said brb, but he was still online, I put ok about 5 minutes later and it said that he had seen it. But he didn't reply. I checked it again about 10 minutes later he still hadn't replied so I just put ive got to go now anyway, and he replied instantly with ok and im back now anyway so I just put yeah alright and logged out. Is he messing me about?