Reaching out to someone you don’t know can boost your mood. So what are you waiting for? Go out there, smile, nod, and talk to people. Do it and do it often. You’ll like it more than you expect. https://www.psychologytoday.com/us/blog/the-bonds-across-the-lifespan/202610/combatting-loneliness-via-the-kindness-of-strangers