Boy you gonna make me fall in love
Now why you wanna go and do that?
Now if I give you all of me
Tell me what'chu gon' give me back?

from 50 Cent (Ft. Mary J. Blige) – All of Me Lyrics on Rap Genius

She’s falling for him and she reiterates

What'chu gon' give me back?

Emphasizing the fact she thinks he doesn’t feel the same way.

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