Why do guys get upset that they’re in the friendzone?

Some guy I knew called me out and went off on me because he felt the same way as my guy friend when I keep shutting him down every-time he asked me out so many times. Every school dance, Valentine’s Day. I did go to the dance with him a TWICE and prom once but AS friends. I’m wasn’t even attracted to him. Then my sister knocked some sense bro me to open my eyes and see that my guy friend was the man for me the entire me and I need to go see him and talk to him. He always sat next to me (hello we’re friends!) Also I’m in love but I didn’t want to admit. Then I realized it that he was the man for me ALL ALONG.

He said it’s my own fault and save the tears because I could have given him a chance but I keep throwing him in the friend zone when I KNEW he was in love with me. I only used him when guys broke my heart, don’t even talk to him (I do talk to him) and he sounds like a great catch but I’m too stuck up to open my eyes and realize it. And NOW I want him.
We’ll I am glad he find someone else. Honestly I wouldn’t be happy if I was dating him.
Why do people convince to date the person that’s love them for years but they have no feelings back?

My guy friend and I are both autistic.

Why do guys get upset that they’re in the friendzone?
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