"You can't use your mental disorder as an excuse to act that way."
But like... it literally is the reason why I'm acting this way. Things I do or say happen for no other reason than my BPD, and I can very well use it as an "excuse." You can't invalidate my illness because it inconviences you. You don't think I already feel like shit for treating you this way or saying those things to you? Try living one day with my brain and thoughts and you wouldn't complain to me ever again. I'm sorry and I love you, but I can't help it. It's so hard to deal with.