You are

[dismemberrichmc]

You are always there when I need you.
You are always there to hold me up.
You are everything I need.

You are the strength that keeps me strong.
You are the sun on a cloudy day.
You are the right when I am the wrong.

You are the one I turn to in times of need.
You are the one I share it all with.
You are the warmth in the cold.

Who are you?