i think it means:
that he needs this person so much. because in his eyes-shes everything hes not. and hes attracted to that. but in end it is that she doesnt need him to live like he does. and she never knew who he was really deep down.
on another note- u cant feel one emotion without the other. its just not possible. you can't feel what sadness is like if you never felt happiness. i can't explain it to make sense.
i think it means: that he needs this person so much. because in his eyes-shes everything hes not. and hes attracted to that. but in end it is that she doesnt need him to live like he does. and she never knew who he was really deep down.
on another note- u cant feel one emotion without the other. its just not possible. you can't feel what sadness is like if you never felt happiness. i can't explain it to make sense.