Hi tuxedopenguin:
Welcome!I'm sorry about what you are going through with your husband. Stressful events can really unleash BPD behaviors. If you could look back, to the first 3 years of your relationship (prior to marriage), were there any signs of odd behavior from your partner, perhaps just signs of anxiety and/or depression?
How embarrassing would it be to get divorced after 2 years, at 30 years old? I would feel ashamed to show my face to any of my family, friends, or colleagues. But what else can I do and how do I know when to give up?
Only you can decide what you want to do, but don't let embarrassment get in the way. There is no shame in realizing you made a mistake. Better to realize that sooner, versus later (and before you have children). I've read a lot of recent posts where it's 30 years down the road, they have lead a miserable life and can't take it any longer. I'm sure everyone in your life would like to see you happy in life and have children free from mental illness.
Some people are successful in hiding mental conditions & bad traits from their partner prior to marriage (or even an official diagnosis). BPD doesn't just come out of nowhere. Generally, someone has been struggling with some form of mental illness for a long time (i.e. anxiety, depression, ADHD, OCD or others)
Option 2: Nothing changes with my husband, but I work on my self. Is it possible to get to a point where this dynamic is fulfilling for me? Can I cultivate enough support, coping skills, and limits that I'll ever be happy with him? Will I get to a point where I am confident having kids with him?
Sometimes, when you work on yourself - your communication strategy and boundaries - it can make a noticeable difference. Things can improve for you, just by changing how you interact.
Even with the best of circumstances, BPD behaviors won't totally disappear for most people. BPD doesn't generally stand alone, as most people with BPD are struggling with other mental health issues. Stressful events in life will tend to knock someone with BPD traits off the good path. Someone can get a handle on DBT strategies, take meds & go to therapy and make great progress. The likelihood is that life happens and there will be bumps in the road (relapses). Job changes or loss, death in the family, birth of a child, etc. can all add stress that can bring about a relapse.
Regarding children, you have to consider two issues: Genetics & behavior. Mental problem tend of have a genetic component. It can skip generations, or you could have multiple children with mental health issues. If the children don't inherit a mental health condition genetically, there is the environmental factor to consider.
I'm not trying to scare you, just sharing some facts that you need to consider in making decisions. If you read enough posts on various boards you will see a trend, in regard to both situations (genetic & environmental).
I've talked to him several times about trying DBT, but he says we won't be able to afford it. While that's true right now I've asked him to look into it anyway so we can plan to make it happen - he has not looked into it.
Marsha Linehan is the authority on DBT. She has some books & workbooks on DBT that you can find on Amazon. There are some online classes that you might want to search for. If you aren't already familiar with DBT, you might want to become familiar with it. One way to get a quick glance about DBT is to go to the website below and look around:
dbtselfhelp.com
You might find that some of the homework you husband is already getting in therapy could be strategies that conform with DBT logic.
At some point, you might want to seek some individual counseling/therapy. A good therapist, who is familiar with DBT, can help you navigate your relationship and guide you towards a decision that is best for you in the long run.