I feel guilty about cheating on him!!!?

You've only talked to this guy right? If so why are you feeling guilty? You haven't cheated on your boyfriend with this guy, you've only talked. It's not like you've jumped into bed with other guy or anything. You should keep trying to call your boyfriend. You need to tell him that you've found someone else that your interested in and that you want to break up. If your boyfriend lives far away and you never, if ever, see him then you need to tell him it's over. Good luck!