I think this song also might be about a boy who is unhappy with his girlfriend because she doesn't show that she cares about him. If she did he wouldn't be feeling so miserable.
"When I'm like this how can you be smiling and saying: How can you be sure I don't want you?"
So basically it could be a relationship were the boy is always uncertain and at the end of the song he decides he doesn't want her anymore for this reason.
I think this song also might be about a boy who is unhappy with his girlfriend because she doesn't show that she cares about him. If she did he wouldn't be feeling so miserable. "When I'm like this how can you be smiling and saying: How can you be sure I don't want you?" So basically it could be a relationship were the boy is always uncertain and at the end of the song he decides he doesn't want her anymore for this reason.