I don't need you.
And if I needed you, my affection would not mean quite so much because then I wouldn't be my choice. You would be something I just couldn't shake and that's hardly as much of a compliment as saying that you're my choice.
You're my choice. Every day I choose you over and over again. I see your smile, and your quirks, and the way you reach for my hand and I choose you again. I am constantly choosing you, constantly making the choice and constantly affirming that you are what I want. I want the you who tries to tickle me when he's happy and the you who will sometimes get so angry that he has to walk away.
I love you and that is my choice. And I will choose you over and over for exactly that reason. Because I am totally and completely in love with you.
I don't need you, but I want you. I love you. I choose you. And that makes all the difference.