[Zero]

i had a very similar situation - indeed if you live in new york we might be neighbors. . . eventually when i had helped the woman with her groceries she said something about 'your so helpful i dont know what we'd do without you' i plucked up the courage to just say 'well you'd better figure it out because i'm done." i proceeded to explain in fairly clear details that i was not going to continue helping them everytime they had a problem.

it was awkward for a while - really it still is - but eventually they just started ignoring me like a stranger.

harsh? yes - necessary for my sanity - absolutely!