I'm 31 should I accept that men prefer to love younger women?

I'm 31 and the guy I last dated was 29 but he preferred 21-year-olds or younger... at first, he was really sweet and nice then had a hangover after discovering my real age and became bland with me. i felt that he wasn't excited about my age. he actually thought I was his sisters age, and she was 21. I look much younger than I actually am.

I myself prefer older men but if a younger guy was mature and a good person it wouldn't bother me.

I'm 31 should I accept that men prefer to love younger women?
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