Should I be Mad at myself or my bf or neither?

Friday night my bf of 18 months and I went out for sushi. It was nice. I said "let's go do some shots somewhere" and he said "i'd rather do that tomorrow night than tonight to be honest with you" and I said okay. We got a couple beers and went home. Then yesterday he left around 10 saying "I'm gonna get out of here", and I figured he was playin golf or out on his boat or something, but he always calls around sunset to let me know what's up. he didn't. I tried callin and he didn't answer. It was 9pm, and I texted him saying I guess you're not coming over. I feel dumb. i'm gonna turn off my phone, hang my nice clothes back up and go to bed. Miss you."

Did I over react? Should I be mad? I know we never said we were definitely going out, or made specific plans, but it sure seemed like it to me. Now I worry when I turn on my phone there will be angry messages from him, so I've been avoiding it.

P.s. my work schedule's changing and it's my last weekend off for the next 4-6 months at least, and he knew it.