I first heard this reading on 'Emmerdale', Victoria read it out at Arron's and Roberts wedding. I think it's very real and relevant and perfect for a modern ceremony.
“He’s not perfect. You aren’t either, and the two of you will never be perfect. But if he can make you laugh at least once, causes you to think twice, and if he admits to being human and making mistakes, hold onto him and give him the most you can. He isn’t going to quote poetry, he’s not thinking about you every moment, but he will give you a part of him that he knows you could break. Don’t hurt him, don’t change him, and don’t expect for more than he can give. Don’t analyse. Smile when he makes you happy, yell when he makes you mad, and miss him when he’s not there. Love hard when there is love to be had. Because perfect guys don’t exist, but there’s always one guy that is perfect for you.”