Why did he say this to my friend?

I was out with a male friend of mine and we ran into one of his buddies. He looked at us and then went to my friend saying “You said you deserve her.” randomly. He didn’t say anything and wouldn’t give me an answer when I asked about it after we left.

Why would he tell me that my friend said he “deserves” me? And then he looked guilty on top of that too
Why did he say this to my friend?
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