It sounds like you have already made up your mind, and are looking for validation that it's the right decision. I am not trying to be harsh.
I am not sure of your org's rules, but if they say that you cannot take early alumnae status, then perhaps you should leave. From what I can see, you are not showing any allegiance to your sisterhood, nor any friendship to the individual sisters outside your little circle.
Let me tell you that if you do deactivate, you will likely not be traveling in the same daily/weekly paths that your sisters will. It will be very difficult to keep the intensity of your friendships with a group of sisters, once you are out of the loop.
I am going to disagree with many here and not encourage you to stay, if what you enjoy most are the external ornaments of membership. Open up the space for a girl who really wants the whole shebang.
It's no fun - for you or anyone else - having someone play if they aren't a willing participant. Time to make a grown up decision, and be able to live with it.
Good luck with whatever you choose.
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