Sounds very similar to my last mania. Bipolar is how it happened, but the why is all you. I told my family about being bipolar, but I owned up to most of the bad stuff I did. I spared them some of it because it wouldn't have done anything but cause more hurt. They forgave me and let me come back. My advice to you is to do the same. Regardless of being bipolar, you have to own what you did. Get help and stop the spiral. Your family is your family. They will be glad to have you back and they will forgive you.