Is age a deal breaker for a man?

So there is about a 7 year difference. I'm in my early 20's, he in his late. One the first date he expressed some concern, asking if I'd dated someone "that old" and if it was fine with me. I was like yeah, truthfully, does not bother me. He seemed to accept this, then said I am mature for my age. I couldn't tell if that appeased his concerns or not. It seems to me that he wants something rather serious and long term in his next relationship, and I don't want my age to be a deal breaker. Thoughts?
Is age a deal breaker for a man?
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