My bf (31) is going through a funk. I need some advice. details within

My bf (31) and I (29) have been dating for almost 2 years. He has been in somewhat of a funk and usually won't talk to me when he is in said funk. I've asked him to please let me whats going on in the past, and its never lasted longer than a day or two. this one is going on 5 days. I haven't spoken to him since saturday. We had plans to go to Slueth at the Kennedy, and he was apparently to sick from going to a bar crawl the night before. We don't live together but both live in Raleigh.

I sent him a message that morning and he proceeded to flip out on me abut not wanting to go to see the show. It was supposed to be part of our anniversary gift and i was really disappointed. He continued to be rude and harsh after I expressed how I wasn't trying to be rude or a bitch, but that missing the show was a real bummer. I've given him his space and dropped off his laptop charger with his doorman on sunday- figuring he'd need it for work. Still no word.

I'm not sure where to go from here!?!

TL;DR: Boyfriend (31) of 2 years got wasted on a bar crawl and then flipped out when i (29) was angry about missing our early anniversary gift of going to a show. He's been ignoring and radio silent since saturday.