I stayed single by sheer force of my mediocre looks, personality, and overwhelming shyness for nearly 30 years. I've been in a relationship for about 3-years and I'm already feeling depressed again. I don't know what to tell you, but that my peer groups have always been as rickety as the ones you've just described. I don't think most social groups are meant to last. They seem to deteriorate, and not necessarily for bad reasons. People move away, change jobs, get engaged, and variables just change. Don't take it personally, and do what anybody does who wants to meet new people and get out there however inevitably awkward that process is always bound to be. Good luck. Life sucks, but I dunno- just keep plugging along and you'll be dead soon. Hooray!