need some help finding a song

nice song played in Movie
The lyrics are:

Time and time I've asked myself why can't I stay away
I know we can't go on, living our lives this way
People talk they think they understand just how we feel

...

We've got each other our love is like a storm
We've got each other our love is growing strong
Just like the rainbows


this Movie is from the 80's I think. About incest or what not... but that song just stuck

any one know this song ???!!!