My Belgian is quite poor but I think it would be something like this:
I saw you walk down the street
With some other girl
Always thought that I was the only one in your world
Baby can you tell me so
Out of sight out of mind ain't what love ought to be
And I hoped all the time that you'd be faithful to me
Faithful to me
All I'm asking you for when you walk out the door
Is to be my baby, baby
I just want to be sure
That forever and more
You would be my baby
Love is just like a flower baby it has to grow
And when you are away I'm even loving you more
I just have to let you know
One on one is the way and that's the way it should be
So if you're not gonna stay
Then don't be playing with me
You can set me free