Name of song?

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hi i heared a song recently and i ant to buy it but i duno what its called or who sings it all i knowit it starts off in all the verses quiet and then chourus loud one verse starts i cant breathe if i cant breathe or something similar and the chourus goes life i dont know how to change i dont know how to feel today im going through changes or something similar does anyone know what song im on about its slow not a dance or rock please help and thanks in advance :)