I don't know what to do?

I suspect my husband has a BPD. I read a whole book about and it really fits the prescription. Out relationship is like a roller coaster. He's trying to leave me three times but I beg him to stay. He doesn't like my son which he is always the issue of disagreement. I disagree with him because he very unreasonable. I really have a strong feeling that he has BPD. How can I open up with him that he or we need to go to therapy.

Hi and Welcome to PC. If you are having difficulties in your relationship and you suspect that your husband has BPD then I would suggest going to therapy. The best way to do this is if you go first. Use whatever excuse you like. Once you start going you will be able to introduce your husband to therapy. Let the therapist guide you and tell you how best to handle the situation. The last thing you want to do is anger him or create conflict. Tread carefully and protect your child. All the best.