Guy friend is dissapointed I can't be friends because I like him and he doesn't like me back?

I told guy friend I couldnt continue being friends with him. I really like him back and he couldnt return them. Cool no problem we're adults. I supported his brief relationship with someone else. I was happy for him. Today I snap because I was so crushed. I told him why I can't be friends anymore. I said " Can I ask you a question? you're mad because I dont want to be your friend because I have feelings for you and I want you to be happy so you're mad at me? He sends back "I dont understand your ideaology but whatever floats your boat. I'm not angry or mad just dissapointed". Someone please explain to me here why he feels dissapointed when I'm the one who has loved him for a year?
Guy friend is dissapointed I can't be friends because I like him and he doesn't like me back?
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