Why do a guy want to ask you if your ever slept with any other after the break?

A male friend of mine, we once kissed. Had issues as I wanted sex and he wanted to take it slowly. So I moved. He started acting salty.

6 years later we met today. The only question he asked me is if I slept with anyone else.

Why do a guy want to ask you if your ever slept with any other after the break?
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