By loving yourself.

Loving yourself is the basis for not needing other people and material things(I don’t mean not wanting other people around you, I mean NEEDING). So when you love yourself, you don’t mind being without other people, because you have yourself.
Accept yourself, your past and your current situation. Nothing can change the past, but the future is yours.
How to start loving yourself? Try these steps: http://coachesinthecity.com/en/21-different-things-to-do-to-love-yourself-more/