How do you find genuine friends

As an adult I'm finding it harder and harder to find others who share my interest and want to be friends with no alterior motivations behind trying to get to know me..... Most of my high school or childhood friends have drifted apart into different life style and we just don't really deal with each other like we used to ..... So I'm left feeling alone most of the time. Am I being naïve in thinking that I can still find good friends in today's society and should I just give up on the idea of having friends as and adult or do people still make real connection after high school?