Yami do you regret your choice? If not, that light dose not need to be by your side. If so, use this as a lesson to always give your light an ear.
Giving into the darkness only confirms your weakness. I hope you regret your choice. Your light is calling you, your light has not forsaken you. Go and save your light. Defeat is better than giving into your weakness.
Fall into the darkness again and your light will not be able to return to you. Remember you are borrowing his body. His soul takes most of the hit. Regret your choice for the sake of your light.
Hurry or not, to save or not save him, go if you choose his soul is fading. Hurry.