What is this song??

This is driving me nuts, someone point me to the right thread to ask this... what is the song that has the lyrics "And I'll figure it out, when I see you again"? It's a very famous easy listening R&B song from like 15 years ago, I know the lyrics, but I just cannot google it because all that comes up is the damn Wiz Kalifa Paul Walker tribute song with the same lyrics. I can't hum it on Shazam, nobody knows what I'm talking about but this song is really famous! If I could just remember one more lyric I'd have it, but I have the whole tune! Ugh!!