Time and time again the people closest to you, your family members, prove to you that you cannot depend on them.
Yet again, the world outside, your friends will too prove to you that you cannot depend on them as well. Or rather, there's a limit to it.
Stepping aside, looking at the whole big picture, once again you'll realise that it is you and you alone.

It's the me , myself and I that I've got. No one else.