[header] How to avoid loneliness when you don't have friends [title] Join a gym or community fitness center. [step] Use your body's need for physical activity to interact with others. Sign up at your local gym for a challenging group class. 
At first, you will feel unnerved by participating in a class full of strangers (and potentially making a fool of yourself). Persist and you will find that group exercise can provide motivation, accountability, and camaraderie.