Ugh. So yeah, I'm pretty freaking mad. I'm tired of this thing where he treats me horribly, says hurtful things, and then thinks "sorry for the bumps" is an adequate apology.
But I can't say THAT. What should I say that is honest and productive? Or do I just let this one go and approach it another way at another time?
I've got a real problem with dishonesty or deception, but there is another question here about sharing your truth, your feelings with him:
That would be acting vulnerably with him, sharing those feelings.
Doing this with somebody you can trust is a powerful thing, and it builds a deeper, more connected relationship.
Doing this with a pwBPD, aka somebody who isn't safe, who will respond badly, blaming you, attacking you, pretty certainly would give you "more bumps" if you did isn't the same thing--it is just a way for you to get hurt.
So, no, I don't recommend that kind of vulnerability to him.
And like coworkerfriend says, this kind of discussion isn't likely to go well by text. If you don't feel up to talking about it in person, save it for later when you are feeling differently. Your anger will pass.