How do people meet or make friends?

From the time i was young I’ve always felt alone, i have a sister but there’s a 10 years gap between us. We have never been close, even in school i had friends but i have never had a close or a best friend.
I hate this, i hate that I’ve never been chosen by anyone. I don’t wanna be dramatic but I’m so sad lately. And I’ve never been in a relationship either. No guy ever approached me, i know that maybe seem pathetic but its just human nature. I always wonder why no guy ever wanted me, or just even be friends with me.
How do people meet or make friends?
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