I think once you realise that that the people around you want more from you than they are prepared to put on the table, you can either decide to play their game, and keep providing the service, or get back to the people who do (instinctively, because they like/love you, whatever) give back without asking...and these days, and in my situation, that's the nuclear family.
I love helping people to learn and evolve, showing them a path to learning, but these days everyone wants the answer, the task done, and not the work or mental effort to get there...but I don't want to hold, let alone carry your monkey for you.
I think the monkey is where society has lost it's way the last 30 years. Extended family used to be the norm, and the monkeys were shared out of working hours...and without mobile phones, smart phones, computers, and instant communication work would at least keep the monkey in the cage or in the air until the next reasonable period of time, and demands were on a paper memorandum with a distribution list rather than stream of consciousness "I need this, and need it now, but won't think myself for at least another week".
One could almost term it psychic vampirism...probably without either psychic or vampirism, just human nature of choosing the easiest path.