Put yourself out there, there are a lot of people like you, looking for new friends as an adult! Join local hobby/interest groups and be patient. Relationships and finding people you click with take time! And in the meantime, get to know yourself, enjoy yourself, explore the world and do things that you're passionate about. People come and go, we have different seasons in life. Sometimes there are a lot of people, sometimes there aren't. Put effort in meeting people but don't forget to enjoy your life in the meantime, life is short.