Oh dear :(
Well, I definitely get that .. I suppose in my case, I had to decide which do I care about more? My "network" or my man? I choose HIM, and so have come to expect individuals in my network to accept or adapt or move on. HE is my "family" now. Thankfully, this has also involved me having to learn to set HEALTHY boundaries with people (not something I have ever done well), and the process has revealed who my "true" friends are. I don't want to sound harsh, but I really "don't care" anymore what other people think. But I also go out of my way to communicate this to my man, too, so he knows IF my network pushes back on me (and as a whole, so far they haven't really, except in my own imagination), that is, "if push comes to shove" .. I still choose HIM.
So as for how you cope with his wanting to leave .. I just cannot believe that the difficulties are "all your fault" which is kinda what it feels like he's saying. If he is pressured to the point he feels he can't handle it, it may be HE has other things he needs to work on, himself .. And if his "network" is more important to him than YOU are? It makes me feel like maybe this isn't the healthiest relationship (please don't be offended; I don't know enough, so it's not a hard and fast opinion, just more of a "sense") ..
Relationships are hard WITHOUT something like PTSD in the mix. Trying to get 2 naturally selfish people to lovingly consider the other person selflessly will ALWAYS take some adjusting and refining, and the occasional big leap. But if there is any trauma in the past, if there is any residual symptom or consequence of the fight to overcome past abuse, if there is any "disability" (I hate that word) ... I think it requires MORE care, MORE patience, MORE commitment .. I might just be an idealist :) .. but is there ANY chance you would be better off letting him go? (asking based on both the above and on a few of your other posts...) It is traumatic to go through a breakup, to be sure! But perhaps it is less so than staying? Perhaps that is the best way to discern the tipping point?
I cannot offer an answer, but maybe the questions will help you find your own? :hug:
~S2B