What should i do? im not liking it. guys and girls help 14+ older only!!?

ok i like this guy and i'm thinking about asking him to sadies. he talks to me in religion a lot and touches me sometimes (hes kinda weird but cute and well-liked). but the past few days he hasn't talked to me as much. matter of fact he's barely talked to me. and theres this one girl who he talks to on facebook. i think she goes to school around me but im not sure our only mutual friend is him. so on his wall all of her replies have haahaaha in it and she commented on his picture saying niiice and my friend thinks your hot. shes pretty 2 and i dont no what he's saying back so what should i do?