Is 31 years for a guy consider old?

My boyfriend going turn 32 next year on February and I will be turning 29 the same month and ever since he turn 30 especially 31, he always tells me how old he feel and I always tell him he is not. He is 3 years older than me but every time he says he feels old I feel like I’m starting to feel old myself when I never felt that way. We are adults but are we really “ that old”. I don’t want to get in that mind set that I’m old now and I think everytime I hear that from him it gets to me.

Is 31 years for a guy consider old?
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