Hehe, its referring to things that are usually emblematic of love (Stars, birds singing, the moon) and saying their relationship however, is "not that kind of thing" because they are just friends...
So I was sitting in my cubicle today, and I realized, ever since I started working, every single day of my life has been worse than the day before it. So that means that every single day that you see me, that's on the worst day of my life.~Office Space