How the heck do you meet someone?

I mean most cases when 2 people get together are just stupid coincidences,like highschool romance,lemme just stumble across you and knock you down then help you with your books so you can fall in love with me 😂 and another stupid stuff like that,I know there are other ways but since i'm not a kind of person that go out much and when I go I usually dont stumble across any of these kind of things so how the heck normal people find someone :/ .