All I Want Is You Lyrics Meaning

There are all these tangible items that she wants to give him so he will still love her. He just wants to remind her that no matter what you do, no matter what you give me, the only thing that will truly make me happy is...you. She also has that fear that with time, she will not be the girl he married and he will not love her anymore. She fears her "love will grow cold" or she won't be able to tell him anything that will surprise him or make him happy. She has sinned before many times; she fears he will eventually not be able to stand her anymore and leave her. However, all he wants is her.
"You can promise whatever you want, but no matter how boring or how wrinkly or how boring our lives become, I'll still have a fulfilling life as long as I am with you. That's all I ever wanted."