Hello Jester20 and
This is a very confusing and upsetting time for you, as you try to sort out being in a relationship with a person with a mental illness. I want to assure you that you are in a supportive place to explore and find answers here. Please take a look at the the links on the right side of this page. I believe that Lesson 1 has several helpful resources for assessing whether or not your partner has BPD. Dialectical Behavioral Therapy is used to treat people with BPD, so there is a good chance that your husband was considered/diagnosed with BPD or BPD traits in the USA.
When you have had a chance to read some of the behavioral traits of this disease, please check back in here and let us know if we can help you with confusion or specific questions that you may have. I know when I first learned of my wife's condition, I thought my world was crashing down around me. I can honestly say that the tools and resources on this site, as well as this incredibly supportive community, helped me to slow down the pain, steady my world and begin to learn how to move forward.
Please keep posting, and take care of your self in this really sensitive time.