Sorry, what I said was ambiguous. I meant "When things are bad, I can't provide the level of communication I seek in a relationship, and so I don't enter relationships." Communication is sometimes subject to PTSD - if I'm in a flashback, I'm not "here," and I cannot communicate well. Being transparent is only subject to PTSD in the context of talking about trauma: the truth of specific events can be hard and I may not be ready to talk about it, in which case I say. Honesty is not subject to PTSD for me - there is no context I can think of in which symptoms of PTSD could cause me to lie against my will. Like Silver, I value honesty very highly and have no tolerance for dishonesty.
The things I post are definitely just my way of seeing things, which is not the only way. Silver is right that you decide your own boundaries, and I hope you find peace and self-respect in whatever you choose.