Why would he say this?

This guy was just asking to hang out with me and I made a joke and he said ‘Jesus Christ you’re not even fucking funny’ with a big smile on his face. I have crush on him so it kinda hurts and now I’m like crying my eyes out. He was literally just asking to hang out with me and I don’t get it. Is he being mean to me cause he likes me?
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I think he feels bad now because I replied and said ‘you’re not much funnier’ and he switched back to just typing instead of sending a voice chats and said ‘I am’. So I said ‘ I’m sensitive’ and he replied back ‘ik’. I think he feels bad but I’m keeping the conversation going.
Why would he say this?
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