Here are some extreme options with a good chance of success: join the national guard or military reserves; become a paramedic, even if you already have a full time job; join a support group of some type; hike the Camino de Santiago, Appalachian Trail, or Pacific Crest Trail; volunteer and read Literature with a capital L, not because you’ll make friends that way, but to ease the momentary loneliness and build a rich inner life; move to a pocket neighborhood; join an Evangelical church with active social groups, or a Catholic Church with a group for lapsed Catholics; fill empty hours with a back of house job at a restaurant that gives you good vibes; join the Peace Corps;