I have two older sisters but we are not in touch - long story - and my father is dead, and my relationship with my very elderly mother is seriously distant.
I am very fortunate to have been embraced by my wife's family, and we have three children and five grandchildren, so I have loads of love around me.
However, at my core, I am self-sufficient emotionally, having never even thought of turning to parents or family in times of support being needed.
I think families are wonderful, but by no means essential. I think what you haven't had, you can learn not to fret over, and try and develop enough self-confidence to develop some relationships which you enjoy.