I feel like a bad person, what should I do?

Anonymous
So my guy friend has been distant from me and seem aggravated and wouldn’t tell me what’s wrong. I asked his cousin about it to see if he know, he had a little talk with him and told me that it was because I took a joke too far and it hit him deep.

His cousin wasn’t supposed to tell me because he’ll get really upset if he found out I knew the truth. But now I don’t know how to get him to accept my apology. It was a dumb mistake and I didn’t mean to hurt him. What should I do?

P. S I hate situations like these when you feel like you’ve hurt someone but you don’t know what it is cause they won’t tell you. And since his cousin told me why, I can’t let my friend know he told me because he’ll get mad him.
Updates
+1 y
I also found out that he wanted to date me but now my chances are low since I accidentally offended him.
I feel like a bad person, what should I do?
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