Welcome & glad you found us!
Like others are saying, make sure to check out the info to the right of this page. Incredibly helpful.
Just a note Re: the "extensive psych eval" next month. Don't be surprised if it ends up that BPD is not the formal dx. It took many years & several evals to determine my BPD hub's diagnosis. Ultimately he got his dx from therapists doing a DSM criteria checklist for BPD. If there is formalized testing involved, it may not indicate BPD due to the fact that many pwBPD do not have enough insight to answer the questions authentically.
Having said that, it is great that your hub is self-aware & willing to work! That is a HUGE positive!
How have some of you dealt with your spouse being really negative about themselves?
When my BPDh is negative about himself, it almost always manifests in him making comments about being a "bad person." It doesn't even always relate to himself directly; pwBPD tend to think in black & white (very much like a child), so I often notice when he is feeling negative about himself he will start categorizing ppl into "bad guy" & "good guy." Even while watching a movie or show, he will say, "That's the good guy," or "He's a bad guy." In these moments, I try to remind him that ppl generally aren't "all good" or "all bad," but that there are gray areas - ppl can be good but do bad things. It doesn't make them an inherently "bad" person.