Any help would be great...H E L P!?

Okay so I started dating and going out with this guy, seriously I fell head over heels for him and it looks like he did to.He would always come to my house and we would talk and stuff. it was so sweet. i love him. and one day he said he loved me, and that he would put it down on anything. i was so happy hes all i need!so i would see him everyday, but then he went to his uncles house for like 2 weeks nd we stopped seeing each other.one day i was walking down the street and so was he and we saw each other and we kissed and he said he missed me, and that he loved me.for that week we would meet up there. i would write him letters everyday (i still do) and these past 2 weeks he hasnt been there.he doesnt even look for me.he jsut disappeared..last night i ped by his house and he was outside smoking, but i really didnt stop to say hi, since i was with my family.he jsut stared at me. and these past two weeks i have written him letters everyday..am i the only one in love?i love him so much, and i know he loves me or at least at one point he did..help! im confused..why does this happen? does he need a break?