Hi OwlLady,
I'd like to welcome you to the family. I'm glad that you have found us, there is hope.
Me, my therapist, his therapist and maybe one sibling of his knows how upset and inconsolable he gets sometimes, but that's it. No one else would ever guess.
That makes, you're all attachments for him, the closer that you are to him, the worst the behaviours are.
He's a saint about 6ish days a week, but on that rage day, whenever it does eventually hit, he's so incredibly critical, angry and emotionally hurtful to me (and only me).
I would think that you're walking on eggshells when you're trying to anticipate what he's going to rage on. My guess is that he's dysregulated at the end of the week because of the stress during the week.
BPD is an emotional dysregulation disorder, it takes him longer than you to return to his emotional baseline of happiness.
When he rages it usually is triggered by a real/imagined self-perceived fault (usually a tiny mistake or bout of uncertainty of what to do in a situation (often a work situation).
Think of HSP's ( Highly Sensitive People ) he's hyper sensitive to rejection, as you put it real or imagine self perceived. He has low self worth, low self esteem, has a hyper-critical inner that plays on a loop back like an VHS tape, that just gives him negative feedback about himself.
A pwBPD have defense mechanisms that protect them but those same mechanisms are destructive and self destructive, it's counter intuitive.
My leaving is usually what gives him peace in the end. When he finally goes to work or just goes back to his daily routine and focuses on his relationships with other people he breaks out of the spell and acts like everything is totally normal.
I can see how throwing himself in other r/s's would telegraph that he's soothed. A pwBPD have
a fear of engulfment and the angry rages are because he subconsciously feels like his sense self is being consumed by the r/s and he pushes you away, it's push behaviour.
You're on the right track,
keep reading, there's a lot that you shared that's difficult to cope with because it triggers high anxiety and it's hurtful behaviour. We're confused wondering what was it that we did that triggered this over reaction? Reading about the disorder helps with normalizing the behaviour and also depersonalizing it. A goal that I would suggest is to become indifferent to the behaviours, you neither like it or hate it, it's something that he's going through it's not personal to us.
My last bit of advice and I did exactly as you've done is allowed myself to be raged at. Sometimes m s my exuBPDw would rage for an hour an hour and half, most of our fights took place at home in the living room or the kitchen, I remember looking over at the clock and making a not of what time that she started with her rages and when they ended. I subjected myself to that for several years.
Set a boundary that you're not going to put yourself through that and either change the tempo around the house and find something that keeps you distracted and out of site, clean the basement or the garage etc... .Just find something or step out and say that you're going out for an errand and that you'll be back. I hope that helps.