Hi DigitalGhost
Welcome back and thanks for posting this re-introduction
Living with a BPD parent can be quite stressful indeed. Your mother has been diagnosed and was even in therapy for a while. Do you feel like she ever really accepted her BPD diagnosis and truly acknowledged that there was something wrong with her behavior?
You are in a difficult situation now sharing a house with your mother. You are already quite familiar with the various BPD behaviors such as projecting and splitting. To help you protect your own well-being I suggest you take a look at some resources we have here about setting and defending boundaries. When it comes to dealing with someone with BPD, boundaries are very important to help you protect yourself:
Getting Our Values and Boundaries in OrderExamples of boundariesDo you feel like setting and defending boundaries is something you are comfortable with doing when it comes to your mother?
We also have various communication techniques here that you might find helpful in dealing with your mother. One of them is D.E.A.R.M.A.N. You are a longtime member so might already be familiar with this technique. The acronym stands for: Describe, Express, Assert, Reinforce, Mindfully (keep your focus), Appear (confident) and Negotiate.
D.E.A.R.M.A.N. is used when you have an objective, you want something specific, such as to get more sleep, to have help with the chores, to affect a change or to say NO to a request.
You can read more about it here:
COMMUNICATION: D.E.A.R.M.A.N. technique You are definitely not alone in dealing with these kind of of things. It's unfortunate that you are now in the situation that you're living in the same house again as your mother, but it is what it is. For now at least. While you're in this situation, I think the resources I've shared with you might help you better deal with your mother.
Take care and I'm looking forward to seeing you around again some more