I briefly had similar thoughts and a 'what next' feeling when I finished my PPL training but just keep finding excuses to fly and the social aspect will follow.
You'll probably find your friends outside of flying will be keen to be involved (just make sure they understand the day out is contingent on adequate weather! Most do and those that don't aren't worth having along anyway...) A flying holiday trip is awesome too.
Also, have a think about your next rating. Not wanting to sound condescending at all but you haven't quite climbed the mountain yet! The next bit of your climb will be just as much fun as the early training 👍