My SO was recently officially diagnosed with BPD. She has PTSD, and apparently according to her therapist, it is now manifesting itself as BPD. I'd suspected for a while now that something was wrong, but I just thought it was *me*, not that she's struggling with this complex illness. 

What are some good resources for helping her cope with this? Especially in discussions. I constantly try to "fix" problems (which then typically leads to more problems), but I can't fix this one. What are some phrases that I can use to let her know that I hear her, without actually showing agreement/disagreement?