I honestly think I'm 迷失 Without 你 由 Blink-182 would work, cause it matches a lot- the lyrics, the tone, everything. It's basically about a boy - in this case, Fang- who missed his girlfriend and was promising to go back, no matter what the cost ... as soon as he could. Look it up, for those who don't know the song 或者 group. It's really very good, i promise. :D
