It is very difficult for us to feel good without our OWN support. I am running into this with my wife as well. I insisted that hy go to a trans-friendly therapist(who happens to be trans as well), and immediately he sugested that not only my wife get a support group, but myself as well. It has been a Godsend! I also of course hang out here and talk to others on chat, which has helped a lot because sometimes I can't ask my wife questions or share my fears without upsetting hym, and here and also my support group, I can.
Do you live where there is a PFLAG or a LGBT center nearby? PFLAG is a great group to attend and they will help her and also most LGBT centers have Trans-friendly spaces, groups or resources. I attend a Trans allies group, which is mostly parents of trans, but there are a few who are siblings or married as well. Also, my wife attends a Own your gender group there, and they have open meetings every 12 weeks so that is a way for me to meet the community and socialize with their supporters and partners.
As for facebook....I have unfriended several long time friends and have chose to approach ignorant people on their timelines and at least state my peace. I also have unfriended family members after some nasty things they posted about the trans bathroom phobia and told them exactly why. Tell her to not sweat it, if they are like that, then she is just actually finding out how they feel and obviously they are not worth her time.