Relationships

How can I be social and confident?

I can't relate to people and I have social anxiety because of this situation. While I can talk to people I don't know with some hesitation, but in environments that know me, such as university, I think that people there are superior to me (more beautiful, smarter and more mature) and I am afraid to talk with them, I can't do it. My self-confidence has started to fade :( I am afraid that people will judge me. What should I do? Real advice please.
How can I be social and confident?
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