You can get counseling help, get a pet, become involved in volunteer work as others have suggested. But the bottom line is it is up to you and what fits for you. After I buried my partner for a second time, I inherited her pet and resumed volunteer work I had dropped when I became a caregiver for both previous partners. Resumed reading more meaningful books.
But the example I like to cite came when, due to family moving circumstances, I had to transfer high schools two days into my freshman year. It was probably the most cliquish of high school environments ever as the "in" group were all sons and daughters of the community's major power brokers and had been in school together since kindergarten. About the third day in, as I wandered the halls at lunch time, I encountered another wanderer. I asked, "You new here, too?", and he said, "No, I've grown up here and gone to school with these kids all my live". I said to myself, "This is stupid". Next day I joined the chess club and the science club. I quickly added other extracurricular activities. By my junior year I was selected for Boys' State, by my senior year chosen by the year book staff for the 5 or 6 to go into the school's Hall of Fame. You have the power and only you can unleash it.
