Welcome to bpdfamily. Keep reading and posting on here. It helps to not only wait for replies to your own posts, but also to read other's posts and reply. From what I've read, many times situations like this develop from being co-dependent. We tolerate this bad stuff from others, because we think they need support. We don't stand up for ourselves, because we lack strong boundaries of what we won't accept from others.
It's tough when you are in a culture that places so much emphasis on marriage. Maybe your own family is full of people who haven't been divorced. It doesn't make you a bad person because you are with a personality-disordered person; a definite possibility that they have a cluster-b disorder. Here is a link to Mayo Clinic's page on the subject. You might find a fitting description for what you are dealing with. You can google more from there. And, of course, find more, if you dig around in bpdfamily.
www.mayoclinic.org/diseases-conditions/personality-disorders/symptoms-causes/dxc-20247656Hang in there! Keep posting. Keep reading. Keep replying.