I'm terrible with guys...do I have a chance with him?

just ask him straight out...embarrasing sure.but if he's acting this way around you its because he doesnt want to make it too obvious that he likes you, but that he does want you to know.so ask and if your wrong who cares.knowing either way will help you both.but try to ask him if he likes you don't COMPLETELY spill your guts out though that would be creepy to him.i have experience in this kind of situation.