He told me I was being disrespectful and hasn't talked to me in months. I can't be in the wrong?

We hit it off quite quick and we got a long really well. However, he apparently said I was being disrespectful several times. I meant it as a joke calling him lame, weird and pathetic, shorter than most guys. I thought he took it as a joke. I also said sorry all the time. He told me that it wasn't right that I spoke to him like that at all and told me to stop. He then gave me an ultimatum that if I didn't quit it 'disrespecting him' then we shouldn't talk or see each other anymore. Now it's been months and I feel bad, I barely see him around and I feel bad. I do like him and I feel bad. He ignores me and doesn't talk to me, doesn't even look at me in classes. Any advice to help out? I can't get him out my mind, he's leaving this year. any ideas?

He told me I was being disrespectful and hasn't talked to me in months. I can't be in the wrong?
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