HELP! PLEASE!

Okay so. Me and my boyfriend are going through a rough patch. We are perfect when we are together. Like enjoying every minute, and talking and it's perfect. BUT when he is at (the job he hates and has to sit still all day) and I'm at school we either don't talk ( aka "okay" or "yeah") or something like that. Or we fight. Cause he gets mad and doesn't talk about it until he is pissed off and neither of us want to stop talking through out our day. But we don't know what to do... Please give me suggestions ..