Most Helpful Guy
Worst case scenario: break up
Best case scenario: he's busy or not in the mood. Some other people suggested he might be angry with you. I would suggest he might be angry with himself and then he might want to preserve you from his current mood. When I'm angry (which happens about once a year), it's aimed at myself but I get snappy. But I have enough self-awareness to try and shelter my girlfriend from my mood because I know I'll be unpleasant to be around.
Be a little patient. Maybe try and see him face to face to clarify. Or find something else to do, to keep your mind busy while you wait it off.
Most Helpful Girl
Sorry, it sucks this happened, but I think it's over.