If I could catch a rainbow

If I could catch a rainbow
I would do it just for you.
And share with you it's beauty
On the days you're feeling blue.
If I could build a mountain
You could call your very own.
A place to find serenity
A place to be alone.
If I could take your troubles
I would toss them in the sea.
But all these things I'm finding
are impossible for me,
I cannot build a mountain
Or catch a rainbow fair
But let me be...what I know best,
a friend that's always there