I honestly think I'm Остаться в живых Without Ты by 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 или group. It's really very good, i promise. :D