It started with a date idea that he had sent me (watching a movie that he's really into.) I told him that the movie didn't seem like my cup of tea. He responded saying don't be quick to judge and we should go see it. I didn't respond because I didn't really know what to say.  He messaged me later talking about the aspects of the movie and why it was so "awesome" I said "I dunno" and "those things don't really interest me." He never responded.

The next day, I saw him in person, and questioned him on why he stopped responding, he said I was being "pissy" and he didnt feel like dealing with it. I said, all I said was that it didnt seem like my cup of tea. I ask if we could do something else instead, and he responds "sure i guess, if you want" like me rejecting the date was me rejecting him.  Mind you we've hung out plenty of times before this.  I said I would try it out and he said "no, youre mind  seemed pretty made up."  He was off the entire day.
That night he basically sends a text saying I'm missing out. (Even though this conversation seems to be over.) I said that I told him I would give it a chance, and he doesnt respond for a long time. I text back and say "that sounds like a no" he says "i wouldnt enjoy it now." Mad now, I said, "I feel like I can't have an opinion" and he says I can but I invite you to do something and you shut me down. I said I was just giving my opinion beforehand because I was afraid he would get upset if I saw the movie and say I didn't like it. He says "this is the silliest arguement ive ever had" i say "i didnt think me saying no to one hangout wouldve been a big deal."

The day after that, he messages me something totally irrelevant like the "argument" never happened. I dont respond and he says "guess youre not talking to me" Not knowing how to respond because I'm so pissed, I say I had a bad day and dont feel like talking.

I had to seem him at an event today but we barely said two words to each other. I mistakenly messaged him later saying I was "sorry for being stubborn" (referring tom me saying i had a bad day and feeling stubborn over the fact the argument was never resolved.) He has not responded.

We're both at a standstill and I dont know what to do to fix it. He is very sensitive but at the same time I feel like I'm giving him a free pass if I pretend
nothing happened... I'm just at a loss of what to do or say next... Am I the wrong one in this?

TL;DR: Guy I'm seeing got upset because I "rejected" a date idea. When I said I was just giving my opinion on it, he shut me down and then messages me the next day like the arguement never happened.