Basically Yami's feelings during his final duel with Yugi and the end.
Disclaimer: I don't own Yu-gi-oh
Moving on
Ever since the day you finished the puzzle, I have always been there with you. I've helped to protect you from bullies and even helped you save your grandpa's soul among other things. During the time that we have spent together many things have happened.
We have become close friends. You may even consider us to be like brothers. I, however, do not. I love you. How could I not? You have promised to help me find out who I am, and have even shared your body with me.
I don't know if you have the same feelings for me. It does not matter though. As we duel at this very moment, I know that you will send me to where I belong and I know that I may never see you again.
Therefore I wish for you to be happy, even though it kills me to know that you will eventually find someone else.