What do other guys have that I don't ?

I'm 20 years old and never had a relationship and I've never had a girl that was into me or wanted me, yet I see guys younger than me all the time with their girlfriends... what do they have that I don't?

I'm confident in myself, not really flashy confident but confident enough (as much as most other guys who have gfs).. what's wrong with me? all I want is what almost every other guy has... (not sex.. but companionship)
What do other guys have that I don't ?
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