I would love some tips
Hi Hannah.
If you have time, I would love a few extra details so I more fully understand your situation.
Do his lows come on gradually, or are they sudden and jarring?
Is he putting his job in jeopardy by not going to work on those days?
When he's low, how does he act toward you? In other words, is he argumentative or say anything hurtful... .or is he just lethargic and less talkative?
Is he on any medication?
Also, you say you often can't get through to him. How does he act when you try to bring up his diagnosis?
I second 123Phoebe's advice. It's helpful to get a better understanding of BPD, for a number of reasons.
Hope to hear back from you.