I’m the same way. I play music solely for fun, by myself. I love playing with others as well, but even in the times in my life when I was lucky enough to be able to do that I still would play music by myself. Common attitudes about music are really toxic imo. Music is at its best when it is free, live, amateur, and enjoyed alone or with close friends, not for an audience with outsized expectations based on the ubiquity of recorded professional music.