oldie tune..does anyone know who sings it??

i only know parts of the song..i tried to search for it and yet no lucky. can u help me?

verse 1:
its so hard. to be in love with your best friend.
cause at times it gonna come when you have to be my lover or friend.
ask my opinion, about your future girl..
but above all else be true to yourself and do what you got to do...

chorus:
i need you now.
i can't tell ya.
how to run your life baby.

something like that..please does anyone know this song or artist??

THANKS!!

Try "There's Something On Your Mind" by B.B. King and Etta James

It carries a heavy burden on your heart to know that the someone that you're in love with is in love with your best friend.