Here's a few more suggestions (I'd like to hear these at my wedding):
"We must be in love" by Pure Soul
"For You" by Kenny Lattimore
"Ribbon in the sky" by Stevie Wonder
"You are the sunshine in my life" by Stevie Wonder
"Settle for my love" by Musiq Soulchild
"The lady in my life" by Michael Jackson
"Fortunate" by Maxwell
"Here and now" by Luther Vandross
"You complete me" by Kelly Price
"Candlelight and you" by Keith Washington
"Make it last forever" by Keith Sweat
"Someone to hold" by Jon B and Babyface
"Love you 4 life" by Jodeci
"Promise" by Jagged Edge
"Make me say it ,again" by The Isley Brothers
"Spend my life with you" Eric Benet and Tamia
"One woman man" by Dave Hollister
"Happily Ever After" by Case
More upbeat/hustle songs

:
"Forever" by Lil' Mo
"Love came in" by Lathun
"Cherish This Moment" by KEM
"Let's get married" by Jagged Edge
"Keep lovin you" by Dave Hollister
"Lady" by D'Angelo
"Come close to me" by Common
"Never knew love like this" by Alexander O'neal
Father Daughter dance
"Dedicated to my favorite girl" by R. Kelly
"Joy" by Blackstreet
"He Is" by Brandy
"My Girl" by Temptations
"You are the sunshine in my life" by Stevie Wonder
That's all I can think of for now, if I think of any more I'll let you know