Death Cab For Cutie - Crooked Teeth Lyrics Meaning

He followed his heart and got with this girl. He didn't think about it, he just followed his heart. Maybe they were both drunk when they got together. Shes so cute when they are drunk because of beer goggles. Anyway, maybe the willow tree is a metaphor for his inner voice which is crying because the he is making a bad choice by going with this relationship. However, the tears refuse to fall because he refuses to listen to his inner voice. They share a bed in which he can't sleep because now his head knows its not meant to be. He can't find meaning in this relationship because there is no meaning in this relationship, hence the refrain. I have no clue what the bit about the skyline and the sun is about.