She is married. Both of you acknowledged you are attracted to each other.
Is it possible that she, in her own BPD way, is trying to keep distance because she is respectful to her marriage instead of putting work into a friendship that could lead her into dangerous territory? What are your thoughts on that?
That is a possibility, but if so, it must be unconscious, as she sends a very mixed signal in my presence. Maybe she herself doesn't really understand how she feels about me - on one hand she behaves seductively, on the other she's keeping her distance; on one hand, she says she has deep feelings for me, on the other she disappears for six months without a word and doesn't even apologize.
As far as the dangerous territory goes, I'm probably the safest man she could be around from her husbands standpoint. I have no problem openly admitting my attraction towards her, and my wife accepts it, and is even supportive of my friendship with my friend - she knows I will not cross the line without the full acceptance of all parties involved. I've seen too many cases where "just a friend" was something else, and refuse to go there. This is one thing I would really need to discuss with my friend, as it has never really been made explicit, and I would like her to tell her husband that he can be quite safe in the knowledge that I will not make a move on her (and would reject her advances on me).
I would prefer if the four of us could sit down and talk, but at this point I would be happy just to have just my friend sit down with me long enough for me to gather my thoughts into coherent sentences. But it feels as if she knew I have something weighty to say to her when she sees me, and so she avoids the subject, either by running off on an errand or talking about something else so I can't get a word in edgewise. Sometimes I feel I should tell her off, but I really miss the intellectual stimulation I get from our friendship when we aren't being dysfunctional - we have many similar eclectic political, artistic and philosophical interests, and that's something I've never shared with anyone else but her; the physical and emotional attraction is just icing on the cake. That's why I still want to put work into our friendship, although it can be consuming.