Loneliness does not discriminate. Probably everyone knows what kind of life events, states of being, and physical burdens correlate with it. Whatever isolation and loneliness comes from, those who suffer from it know why solitary confinement is one of the worst punishments prisons dole out.
A training life can move you out of the lonely place into a new life.
Growing your own training life from the ground up will lead you into short, manageable social interactions that begin slowly and gently to drain away the loneliness with each outing. You’ll have time to think, to hold problems up to the sun in your mind and heart, and to subject them to the light that dawns as you move.
The sunshine can boost you up some more.
Start simple: a walk or hike. Go to a nearby running track, a trail you know, or a park with long sidewalk pathways along a lake or river. Or just make the city blocks in a familiar area your training scape.
It is training, and retraining your brain, nerves, muscles, and body chemistry simply to get out and move in the outdoors. So much happens when you do this, there is an automatic element to outdoor outings.
Dress in what’s comfortable, do what you need to do to feel comfortable to get out the door. Then soak up the world’s outdoor riches as you journey.