
Peace and Calm,
No, you are not crazy. I was married to someone with BPD for 14.5 years but should have ended it it long before that. We had 3 children who have all been diagnosed with BPD, they are all in their 20's. Two of them are in relationships. My daughter has been with her boyfriend going on 10 years, he has stuck with her through hell and back. My son and his girlfriend have been together a little over 3 years, and both of them have BPD.
I suggest reading books on BPD, doing research on it and familiarizing yourself with the signs and symptoms, as well as what you can do to make it easier on both of you. Also, if you plan on sticking by his side, get yourself a therapist. Preferably one who treats BPD. BPD is extremely difficult to deal with, not impossible but you will have to decide for yourself if you are in this for the long haul or not. Remember the only person you can change is yourself.
That being said, you have a choice to make. Either leave now or stay and prepare yourself.
Best of luck to you.