I do respect what you are doing re: those boundaries
because of some experiences that I have had with
a long-term friend of over 25 years.
It just started getting uncomfortable and pressured - such that I dread getting together with her - keep trying to think of how to maybe get out of getting together - at one point I said "no phone calls - no emails - no invitations" but I find myself again dreading gettng together (and we haven't seen each other for about 2 years now - mutual schedule concerns). It the snappishness - now turned into intrusiveness (like I wonder - where did all this come from?)
Seems to be a control interaction - for reasons that I do not understand. In any case, I don't like being with someone who has to be so controlling - and I still don't know how to sort this out very well - but to say to myself that we are different, we have developed different ways of interacting - and something has to change.
I have changed it by being unavailable (because I don't know what else to do).
I wish you luck.
It's kind of sad when a valued friendship ends.