Lyric discussion by mydreamquest 

Cover art for I Feel Better lyrics by Frightened Rabbit

when your final act to a loved one is the last loved song you'll ever write about her tells me that this is a song about depressed feelings after a few cups of coffee. the energy of the music is as if a man has recovered from trapped feelings of love for someone he's since separated from.

clouds seems to refer to clinical depression; and in the lyrics the author is indicating that some light (not feeling as depressed) does make it thru the clouds of his depression from time to time.

The writer confesses he is imprisoned by his depression with the line "now I am free in parenthesis". Parenthesis implies being locked behind barriers. So when you are free and yet imprisoned at the same time, that cannot be great feeling.

I think this song is the author say he's happy despite being in utter misery.