I love you. I am who I am because of you. You are every reason, every hope, and every dream I've ever had, and no matter what happens to us in the future, everyday we are together is the greatest day of my life. I will always be yours.

This quote is expressing a deep love and appreciation for someone. It is saying that they are the reason they are who they are and the source of everything they hope for and dream of. No matter what the future holds, each day that they are together is the best day of their life and they will always belong to that person.