If I was your boyfriend I'd never let you go yeah, swag, swag swag, swag swag, swag, swag :D
A good song to dedicate to your boyfriend is what comes from your heart as if you wrote it. Write whatever you love about him. Also you can find some songs that inspire you and then try to write good songs for him.
Smother me - The used
enrique iglesias-hero
say bye bye
"Our Song" by Taylor Swift is a cute song about a good relationship "My Baby Loves Me" by Martina McBride is another good example
the song boyfriend by Justin bebier is about a boyfriend
smile by uncle cracker.
Nicki minaj your love
"Crazier" by Taylor Swift
"Luv Song" by Jane Jenson. It's not on itunes.
the way i love you by Taylor swift :)
Scrubs by TLC