I think this song merely means that at night he feels like he belongs there and with me I have that exact problem going to sleep because we have all these different things going on inside our head. He feels he needs to know that when hes asleep that he is safe and even when he is asleep there's still a party going on. When you're awake you feel as though time stands still and that it always will as long as you're awake. When you're asleep you can't really feel anything. Its as though you are only resting your eyes for about a minute when in reality its been about 9 or 10 hours. He thinks about this problem but he isn't sure whether he wants to change it or not. He has wonderful memories when hes awake at night. I think fireflies are a symbol of light and a sign of an escape from the dark. He has his firefllies who protect him at night and he is grateful for them. That is why he cries when they leave, but he remembers that they come every night. I feel its a great song for someone who feels lonely and depressed mostly at night. I could be wrong about this whole thing, but I don't care. I stick with my philosophy.