Hold my hand by MJ and Akon

Could I ask a question about the song "Hold my hand," please?
What does "Cause I been there before and you've been there before" mean in the lyrics?
Does it mean that I experienced something bad and you had that kind of experience as well?

Part of its lyrics are as follows:
This life don't last forever
(Hold my hand)
So tell me what we're waiting for
(Hold my hand)
Better off being together
(Hold my hand)
Being miserable alone
(Hold my hand)

Cause I been there before and you've been there before, but together we can be alright. (alright) (yeah)
Cause when it gets dark and when it gets cold we hold each other till we see the sunlight.

So if you just hold my hand, baby, I promise that I'll do all I can
Things will get better if you just hold my hand
Nothing can come between us if you just hold, hold my, hold, hold my, hoold my hand, hold my hand.