I ignore cliques and sort of float between them all. I have never been in a clique. You get them in all walks of life, school, college, workplaces, clubs, churches. It's just people who have things in common getting on well with each other. I've foudn it tends to be women who grew up in the same area and who are all married and have kids now and the ones like me, well travelled and who have a career are the outsiders.
I find that I can be friendly with everyone on a superficial level a hey how are you doing sort of thing and move on to the next person and say, hi how are you, but my closest friends are the other loners. I've moved around a bit so have been to a few different churches and have kept in touch with the one or two people I met there that I got along with. So I have a group of friends, but we are spread out across the country and we get together every-so-often. This is what has worked for me. I gave up on the idea of having conventional relationships a long time ago. I just don't fit in with cliques at all, so i stopped trying.
Hopefully you'll meet someone you click with. I don't know if you would want to go down my route of visiting lots of different churches and meeting one or two people and keeping them as friends regardless of where I went next, you many want to only go to one church, but the moving around has helped me meet different people.