Isaiah 46:4 "Even to your old age and grey hairs I am he, I am he who will sustain you.  I have made you and I will carry you; I will sustain you and I will rescue you."  

The truth is, no matter how things may feel in the moment, God has never left our side.  God will never leave us.  It is we who leave Him and fail to put our trust in Him.  The good news is that He will always be there to accept us back with arms wide open.  No exceptions.