I don't know what to do. I don't want to leave her. I want to be supportive. I know this sounds like a laundry list of red flags, but she has immense care and love inside of her when she isn't upset. There are times where she recognizes that what she is doing to herself and to me.
But I'm really concerned about my own mental health. I constantly feel like a failure and a bad boyfriend, and I feel like a bad father in not being able to give my daughter-to-be's mother what she needs.
Hello and welcome to the family! I'm so sorry you're going through this but I'm very glad you found us. Hopefully we can help you find some answers.
See the first sentence that I bolded above? That's the key to all of this. When her emotions take over, there's no telling what she'll say or how she'll react. Everything is over the top because that's how she feels in that moment. And feelings are just as real as the physical stuff in our lives.
Notice how you ended the sentence...when she isn't upset? That's what we focus on. The goal is not to avoid every blow-out or ensure she never "loses it" again, it's to help her calm down when she's disordered. That's the whole ballgame, everything you need to fix this.
How do you do that?
Think about your newborn child on the way. For the first year or so, they can't talk, they're horrible at communicating, and the only sign you get of something being wrong is ear-piercing screams and crying. What does the baby need? Is it hungry? Does it have gas? Is there a diaper rash or a bug bite you're not seeing? It could be a hundred things, a thousand even, and at first it feels almost impossible to do anything.
But then you cradle the baby, talk to it in a calm voice, and the baby feels that love. If you pick up the baby while you're upset, the baby somehow feels that and it gets even more upset. You're not in this situation yet but I promise all of this is true. The baby feeds off your emotions way more than you can ever imagine. So when you're calm and nurturing, the baby relaxes and stops crying.
And this is how you calm your girlfriend down- exact same technique, exact same concept. Now, she can talk and she's sometimes saying horrible things. Ignore that stuff as much as you can and think about how you calm an upset baby. You're not trying to fix the problem, you're just trying to calm her down so she can realize that there was no problem to begin with...or it's a highly managable problem in a calm, balanced mindset.
Now let's look at your 2nd quote. Your mental health always comes first, regardless of what's happening with your girlfriend. So if it gets to be too much, walk away. Simply tell her that you don't want to argue and you're stepping away for a moment to clear your head. This prevents the situation from getting to the all-out meltdown phases because it takes two people to argue. So if you don't respond (or respond lovingly when it's not exepcted), then you're not arguing anymore.
Remember how I said that the baby can feel your emotions? So can your girlfriend, it's like a BPD superpower. Every movement of your face, your body language, your vocal tone, it's sending signals on how you're feeling in the moment. Your girlfriend picks up on all of it so if you're saying, "I love you" but your face says, "I'd rather be anywhere but here", then she's going to believe your body language.
So if it gets to be too much, walk away. Tell her that you love her and you don't want to argue about anything, and you'll be back in xx minutes.
As you learn to better communicate with your girlfriend, things will probably get worse before they get better. And at times, you will make huge mistakes that leads to an all-out screaming match. That's okay, you're human. We all mess up from time to time and these relationships can be extremely unfair. Either you can figure it out or you won't, but it's good you're trying at least. So give yourself some credit.
Also, accept that so much of what she says when she's emotional are just empty words meant to make her feel better in the moment by blaming someone else. She doesn't mean most of it. And while it would be great if she didn't say those things in the first place, you still have some control in how you react. It might be helpful to think about therapy for yourself or a local mental health group, just to have people close that can relate to this. You have us as well, which is why I'm so glad you posted.
Let me know if any of that resonates!