Who sings this song? I know only some of the lyrics...

"Tell me if you want me to, give you all my time I want to make it good for you, cause you blow my mind, I promise boy this I'll be good..."...

I am pretty sure you are thinking of Groove Theory, "Tell Me"

Please take a look at this link:

GROOVE THEORY Lyrics - TELL ME (http://www.mp3lyrics.org/g/groove-theory/tell-me/)