I think it is about giving everything to a lover who then proves to be an absolute bastard, regardless you cant help loving them but you tell yourself you wont cry for them because of your pride.
the verses are about the things that you do when your guard is down 'because i wanted you' is the justification for letting yourself be hurt, the chorus convincing yourself that you won't waste your tears on them.
I think it is about giving everything to a lover who then proves to be an absolute bastard, regardless you cant help loving them but you tell yourself you wont cry for them because of your pride.
the verses are about the things that you do when your guard is down 'because i wanted you' is the justification for letting yourself be hurt, the chorus convincing yourself that you won't waste your tears on them.