Do you know where is could read more about that aspect but f BPD?
I'm with SINISTER MIND here - like totally. ANYbody that wants an open relationship does not respect you. Searching for the reasons to justify this request will be like searching for a needle in a haystack.
Are you familiar with F.O.G. ? Fear - Obligation - Guilt is a sure sign that you are under the influence of manipulation. Could that be the case here do you think?
Like SINISTER I coming from a truly supportive place.
Hang in there - do what's best for you first.
Rev