Told me he was single. But why?

I was talking to a colleague whom I have a crush on and we were talking about something and he randomly mentioned "I'm newly single". I don't know why because it literally had no basis or correlation with what we were talking about. We were talking about the upcoming summer and he just said it. Does he want me to know? As a guy, would you tell a girl you are single flippantly or for a reason?
Told me he was single. But why?
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