Wow, Mako...
What you say sounds incredibly unfair and hard to imagine happening. How did all of this come about? Surely there's more to the story than just "I have chosen not to fully transition, so I'm being shunned."
I believe that this is every person's personal journey that should begin and end exactly how WE decide it should -- I'm very surprised that this is not the general consensus within your local transgender community.
I fully plan on living my life as male until the time comes when I decide that it is time to socially transition. That might be 6 months from now, 1.5 years from now, or NEVER -- hell, I don't know! I surely don't expect the local transgender community to have a problem with that.
Truthfully, I believe you're giving these folks far more power than you should. Just don't engage... so what if some group doesn't like you? Find another one. Truthfully, I believe you'll be happier long-term finding some local cis-women to hang out with, anyway.
~Sara