Pray to God for strength and maybe new surroundings, He will send you the people, don't worry. That's how I met all of my recent new friends. In the past year since I first gave my life to Christ I've made so many new friends. Now my church has a young adults group that meets on Friday nights, but, they are people from random different churches. Me and this girl Jessica are the only young adults at my church. And I've started looking into other churches for that reason, without quitting my young adults group. Maybe you could search for people in your area that get together during the week and meet new young adults that way.