Why don't I care about being rejected anymore?

When I was younger in my early to mid 20s, I used to get very sad when I didn't get cute guy's attention. I knew I am rejected without even asking them out. I used to feel really bad about it. Now that I'm older, I just don't care. At the end of the day, I feel like it doesn't really matter to me any more but I can't figure out the reason why I feel this way. I no longer feel bad any more. As I've gotten older, I have also realized a lot of guys simply aren't even worth my time.

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I also feel like I'm less desperate for a man's attention as I get older.
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I am actually more attractive now than 5 years ago. Though I get rejected less, I care way less about it than years ago.
Why don't I care about being rejected anymore?
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