I cannot recall the best advice I got from my father but the best advice I got from a man that's not my father is to make friends with loneliness
If you and loneliness are enemies you'll be lonely
but once you and loneliness are friends you'll be solitary
The difference between loneliness and solitude is the difference between the naive kid who thinks one's happiness depends upon others and the wise sage who knows that one's happiness depends only on one's self and one's self alone.