I need some advice..can anyone help me??

[Insane Crack Hoe]

well here it goes..
My best friend is a guy and i have been hearin that he likes me..but he has a g/f. Then today i was messin around with my ex and he saw me..now he won't talk to me anymore.. I need your opinion on what to do about it.. The dude i was messin around with is graduatin this year and i'll probably never see him again.. how can i explain this to my best friend?? Secretly i've really cared for my friend for a while and now i'm afraid i've really hurt him..please help me...