So my boyfriend of several years is married and separated.
Please some words of encouragement to tell me it doesn't matter and we are doing the right thing by not living together!
Since the first statement is in effect, I would then say that you are doing the right thing by not living together.
Not sure I'd encourage you by saying that it doesn't matter though (the being involved with a man who has a wife he is not divorced from, and has BPD to boot).
But it works for you, and him... .How does it work for his wife? Has she any interest in trying to save her marriage (hence the lack of a divorce)?
Is she Okay with all of this? If so... .well, maybe your theory is fine for the 3 of you... .
Gotta say, it's an interesting way to look at triangulation, though