You joined as a member and left as an officer
Both of these are consistently true: you did not want to run it, and you are running it. Saturn in Capricorn in the 11th house means collective life keeps converting you from a member into an officer, generally within about a year and usually without a vote.
The 11th house is friendship at scale and shared aims; Capricorn takes responsibility for whatever is not being held. So you join something for the thing itself, notice that the arrangements are failing, step in temporarily, and are still doing it a decade later.
It comes due when you have to be an ordinary member
The test is belonging to something without a role in it: attending, contributing, and letting other people make the decisions badly. Your instinct is that this is a waste of your capability. The capability is not the point of the exercise. The point is finding out whether you can be somewhere without being responsible for it.
They think you wanted to take over
Because you step in where things are failing, some people conclude you were angling for the position, which is close to the reverse of what happened. The misreading is durable and it is worth defusing at the point of stepping in: saying out loud that you are covering, for a stated period, and that somebody else should take it after that.
The weight is that it depends on you
Whatever you are holding together — the group, the tradition, the annual thing — would not survive your stopping, and everybody involved treats its continuation as a natural fact. That is a substantial ongoing obligation performed for free. It is also a design flaw in the thing itself, and the flaw is one you have been compensating for rather than fixing.
A community that runs without you
What this builds, once the handover happens, is what you were actually trying to make: something that continues on its own, with proper arrangements behind it, no longer dependent on any single person. That is the achievement rather than the running of it. It requires you to leave, which is why it has not happened yet.
Your friends are people you met through committees
The circle around you was assembled almost entirely out of shared responsibility rather than shared enjoyment: the board, the organising group, the people who also turned up. Those friendships are solid and they all have a job attached. Somewhere there is a person you like for no functional reason at all, and you have probably never arranged to see them.
You inherited a duty to the collective and never questioned it
The conviction that somebody has to hold these things together, and that it might as well be you, arrived from somewhere — a parent, a tradition, an early example — and has never been examined as a belief. It has produced a great deal of good and it is a position rather than a law of nature. Other capable people decline, and nothing collapses.
You look for somebody who takes obligations seriously
What actually attracts you in the long term is evidence that a person keeps their commitments to other people: how they treat their friends, whether they turn up, what they do when it is inconvenient. That is a considerably better filter than most and it selects for people as busy as you are. Two people with your standards can go years without an unscheduled evening together.
The subscriptions and memberships have accumulated
Your commitments to organisations, causes and groups have built up over decades in small annual amounts, and several of them are attached to things you no longer attend. The total is larger than you would guess. Reviewing the list once is not meanness; it is the same discipline you apply to everything else and have somehow exempted here.
Your friends became the reliable structure
The circle you built supplies the dependability that your family of origin did not, and you have organised it with the same care you would apply to a household. That was a considerable act of construction. The people inside it mostly experience it as good fortune, which is worth correcting at least once with somebody who would understand.