Well, it depends. Is she hindering your quality of life? Is she causing you a lot of problems with your BPD, like triggering a lot of bad memories etc? Is she making you do things you don’t want to do?

Because I think a lot of us here definitely know the sadness it causes to stop dating someone because of their mental illness. I think people, if they really like the person, should start developing ways to cope with their significant other’s mental illness. But take a step back. Does it work for you? Are your previous influences of abuse clouding your relationship with this person? Is she being abusive to you?

You say continue dating your girlfriend, so I’m assuming you have been going out with her for at least a few dates, and I’m also assuming you got to the point where she was comfortable enough to tell you she was a sociopath (and I assume you’re not diagnosing her), so I’m guessing it’s either been a problem all the way through (in which you should address right away, tell her what happened in your past and maybe you can work on it together. Maybe she will be able to “avoid” you when she is not well, you know, whatever works for you two) or something triggered it, for you to be questioning your relationship with her. I think either way you should sit her down and talk about it (that is if you want to keep dating her, that she is not hindering your life quality) and find out what works. What are your triggers, what should she avoid doing?
Best of luck,
Chelsea