R&B songs about someone being important to you?

I'm lookin for songs like....
Good Luck Charm - Jagged Edge
Sure Thing - Miguel
She Ain't You - Chris Brown...

Basically songs saying about someone who is iMPORTANT, but not quite a
"in lovey dovey" love.. I say "she ain't you" because she's not my
girlfriend, but she is extremely important to me, and I do love her
like a lover. And I say like good luck charm because saying how shes
important to me, I'm lookin for songs along those lines... RB
preferably, Rap if there are any...