I can't be myself around people that look fun to me?

Sounds ridiculous, but i can't be myself around someone that looks fun to me. I call it “a friend Crush”. When i have the chance to talk to them and get to know them, i go silent and i freeze completely. My fear of being rejected is too big. Even though i know i have nothing to lose.

how can i change this?

I can't be myself around people that look fun to me?
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