If I drop off one of the شائقین will he/she get e-mail that I am no longer a پرستار of him/her?

Nope, but their پرستار number will go down.

No, آپ only get messages when someone شائقین you.

Their number will go down, but depending on how many شائقین the person has and how often they're added سے طرف کی people, they probably won't notice if آپ drop them.

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the number will just go down like once someone faned me and didn't mean to so she unfaned me and it just went down : )