This is Christofer Drew, from Never Shout Never. They are described as an American Rock band, but some of their music is quite folk. Their new album 'Time Travel' isn't as good as their other stuff, but if you haven't heard them then listen to 'Trouble', 'Can't Stand It', 'Happy', 'Cheater Cheater Best Friend Eater' or 'I love You 5'. You might not like them, but the songs will definitely make you smile:')

You make me happy, whether you know it or not,
We should be happy, that's what I said from the start,
I am so happy, knowing you are the one that I want for the rest of my days, for the rest of my days...
you're all of my days.