I didn't know

My BF is mad at me because I didn't know we were in a serious relationship. I told him about a year ago he was my man and he said ok but I was drunk. Next day , He start acting distant and asked was I drunk talking and I said yeah. I was only playing. We've been hanging out and he's been doing everything for me and we act like we are a couple. So I asked him where does he see this going last month. He said it's going good and he can see himself being with me for a long time. That was  So lately (past few days) I've been giving the old shoulder. He asked why and I told him because he's not serious about me. We've been dealing with each other for almost two years and he hasn't tried to make us official. He said "what the hell have we been doing all of this time ?" I said I thought we were just friends. He told me I was insane. I didn't know we were together because he's never said anything about it. We never made it official. So now he doesn't want to talk to me.