A Friend Who's Always There

If I could catch a rainbowI would do it just for you,And share with you its beautyOn the days you're feeling blueIf I could build a mountainYou could call your very own,A place to find serenity,A place to be aloneIf I could take your troublesI would toss them in the sea,But all these things I'm findingAre impossible for meI cannot build a mountain,Or catch a rainbow fair,But let me be what I know