my boss is fucking pissed at me. he's an overly senstitive japanese guy and I kind of fucked up by saying a few weeks ago I could work during my full-time school, so now, on his birthday (because it's getting too late) I had to tell him I can't work at all, and as usual he's pissed as fuck saying I thought we were friends and now I don't even want to go to work to face that bullshit, how do I fix this