Lyric discussion by Occams_Harmony 

Cover art for Sunsets lyrics by Powderfinger

I think this song is about someone lamenting about another person. He regrets not doing enough for his friend/significant other, and that the person he cares about has made a lot of mistakes. But he resolves not to pity them or to make them feel better, because it's their fault in the end, and although he regrets the decision they made, he won't do anything about it. He watches the sunset on the beaches.

That's just my opinion. Great song.