Do people regret not appreciating people that loved them?

Someone said that people regret when they didn’t appreciate person who loved them when they got older, cause it’s hard to find person that will truly like you. Is it true for men? I liked guy really hard but he didn’t like me back and we stopped talking. It is actually happened to me kinda often when someone didn’t like me back😅 but I don’t think men kinda regret about things like that🤔 it feels like it much easier to find someone for men than for women that is why they don’t think much, or I’m wrong? And men probably only regret about women that they liked but couldn’t stay together but don’t regret about letting go women who loved them🤔 I think women can regret about it more cause men should love you more🤔 or I’m wrong?
Do people regret not appreciating people that loved them?
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