How many times do you thought about break up your relationship?

last night, it was already 6am, and I was not able to sleep, but I was trying hard to, because I would have important things to do today and had to be with fresh head during the day.
My boyfriend was also awake and seemed to be unable to sleep, too. He hugged me but I asked him not to do so, because that would hinder me fall asleep.
He picked up his phone to check the time and I asked him what time it was. He said "it's almost 6am" and I said "damn, is so late and I don't know why I can't sleep."
After a while he got up from the bed. I thought he was spending time on the computer, since he couldn't sleep.
I noticed that he was wearing his clothes and picking up the keys. I asked him where he was going and he said he was going for a walk.

When he returned (after 45 min), he was lying on the couch. I asked him "why not lay in bed?" and he said that was almost time for wake up.
It seemed strange to me, but I thought it was just me (although not understand why he left home at 6am for a walk in the cold).

Basically, he prepared first and he got out to take the trash outside.
later I realized he has not left just to take out the garbage, but was gone to school without me even if the lesson begins only after one hour. (we could have gone together since we were going to the same place).
I called him and sent him a message, he doesn't answered none.

when I got to school, he was there playing games on his phone.
I asked him what was going on and he said "nothing." after that, he been all day without speak to me and saying to leave him alone. I asked him if it was because of rejecting the embrace, and he said no. And when I ask him what I did then, he ignores me.
I love him, but honestly, I'm sick of these attitudes. He is always upset with all the fucking little things. And he don't even talk to me for me to realize what I did wrong / if I did something wrong. I like to talk so I can understand him and he can understand me, but it is useless to try.

He makes these tantrums often, that's why I'm tired and irritated of these nonsense and childish atittudes. And in the end I always end up to apologize, even though not done anything bad. we are together for a year and half now, and I still love him, but it's dificult not to think about a break up. I have thought about it a few times, although I think that I am not able to do it. Is it normal in a relationship?