Ok i got bf problems and i need help!!!! pleez!!!!?

last week a guy tht ive been in love with for 3 years finally asks me out over the fone and thn tells me to call hym bak later cuz he wants to sleep. So i call bak a couple hours later and he doesnt answer. its been an entire week of hym ignoring my calls and refusing to talk to me. and thn today i try and call and he actually answers and hes all nonchealant about it lyk nun happened and i ask hym wat happened and he said he doesnt wanna talk about it. he says i didnt do anything and hes not mad at me and thts its sumthin else but he refused to tell me wat it was. and thn he hng up and he wont answer my calls again e_e i txtd hym saying i love hym and i wanna help hym and all tht but i have no idea wats rong. I dnt think he wuld cheat on me the first week we got together and plus he has never cheated on anyone before. but his dad hates me.... what do u think is rong????? help pleez!!!!