Sometimes, when I have moments like this, I think to "I'm a blonde, women don't like that." How can I get rid of it?

I know it sounds stupid but it's true. I probably thought it was too high, even though it's not true, that that's the reason I don't have a girlfriend, although my best friend (a woman) says she can't imagine being in a relationship with a blond man.
Sometimes, when I have moments like this, I think to "I'm a blonde, women don't like that." How can I get rid of it?
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