My boyfriend never talks to me anymore...?

so we started dating in june and you know how there is that summer holiday.. so well we talked quite alot like face to face before the holiday cuz we actually got alot of time to see each other, but then since holiday started he never really talked to me... he used to stay on msn forEVER, and now i don't even see him go online.. and when we had this double date he showed up like thirty minutes before i had to leave... then towards the end of summer when we had this hangout thing with our friends, that was like the first time i saw him in 3 weeks or something like that and he pretended like I wasn't even there. and it's so confusing cause he still tells me that he loves me and he started liking me for like two years before we started dating...

school started and we haven't said a word and he's always off hanging out with his guy friends after school.

I really don't know what to do anymore??