I really like this guy but what is he after?

okay so im i realy like this guy and he says he likes me 2..he says the sweetest things and he begged me to be carefull after i got lost in the city and he says that any guy would be lucky to have me and stuff like that and he asked me out twice now..but he was drunk the first time and the second time i thought he was drunk but the day after i found out he wasn't..he went away and got a gf ther then he came back but his gf deleted him off fb and didnt want 2 talk 2 him and now he is really sweet and i think he changed he said that he was sorry for the time he askd me out when he was drunk he think he realy let me down and he said but the time he did mean it..he would like to do it in a better way..and we're like more thatn 500km apart and he said he'd come to my sixteenth birthday..and before he left he wuld just not reply my texts and mesaes and now he even said that i can text him wenever even at nyt and he will reply and he actualy does and he never inboxd me and now he does..but i don't know what he's really after my friends said 2 be careful because he hurt me before..my head says be careful but i cant...i realy think ther myt be sumthng but i dont know what can i do..help me please