Basically, in my opinion, it's about one person having feelings for another with the other one either not returning them, or having them at some stage but then losing them. The first verse sounds like he wants to go back to a time when everything was perfect with them. "Could you always be the one who says goodnight" is fairly obvious, him wanting her to be the last person he sees at night and the first person he sees in the morning..
As for the video, that basically looks like she thought that they were perfect for each other and that something could happen, but he never saw her that way.
Basically, in my opinion, it's about one person having feelings for another with the other one either not returning them, or having them at some stage but then losing them. The first verse sounds like he wants to go back to a time when everything was perfect with them. "Could you always be the one who says goodnight" is fairly obvious, him wanting her to be the last person he sees at night and the first person he sees in the morning..
As for the video, that basically looks like she thought that they were perfect for each other and that something could happen, but he never saw her that way.