Was I in the wrong?

Tiny bit of my background, so this makes sense... People hardly ever keep the promises they make to me. I've been let down a lot.

Ok, so I was texting my boyfriend, and he had a pretty rough day. I did my best to try and make him feel better, and after a while, he said he was. But he wound up not keeping a promise he made to me yesterday, something we were going to do, and that I was looking forward to. I was pretty upset, because, it was like, "Now he's doing it, too. Not keeping promises..." So, as nicely as I could, I told him I wasn't upset about not being able to do what we were going to, but I asked him please not to make promises he won't keep, because I didn't want him being one of the people who does that to me, too. He was kind of like "Ok, got it." but it somehow came across as offended, which I didn't intend. I asked him "What?" and he just said "..." and I was like "Well so much for cheering you up. It doesn't seem like I really did." and he never said anything. I waited about 15 minutes and (all the while I'm getting more worked up) then I said "got something against answering me?" and he still didn't say anything. I waited 10 more minutes then I said "well the silent treatment works both ways, you know! when you finally deign to talk to me again, don't expect me to be happy fun conversationalist. i hope tomorrow goes better for you than today, but if it doesn't, don't ruin my day, too."

My question is this: Was I wrong to get mad at him like that? Should I apologize? I mean, he had had a pretty bad day. But then again, he wasn't answering me, without any visible reason. I don't know. :/ Can someone help please?