what does this mean?!?!?!?!!!?

OK so me and this guy have been friends for a year now and he is always truing to make me smile and picking on me but is always defending me when someone else is messing with me and the other day I'm pretty sure was trying to make me jealous so we exchanged numbers so we could keep in touch over the summer I texted him a few times he texted back for one of them and then a few months later sends me a Facebook request I accept and try to text him again but he never texts back anymore expect that one time so then a month passes and my friend says he is going to another school this year which upsets me cause he didn't tell me do (you think that could have something to do with it) so I post on Facebook yesterday lms for a tbh and he likes it so I post on his timeline "tbh you cool funny and cute hmu sometime" within a mintune he likes it and then comments on it with the hand sign OK twice why does he keep piping up then ignoring me does he like me or am I just over thinking it please help I'm very confused