My boyfriend of almost 3 years asked me to marry him the beginning of October. He brought the subject up and told me he wanted his future to be with me and he was certain. About 3 weeks later he said he was having cold feet. We didn't talk for a week. I texted him and asked if he wanted to talk. He said he did but I "should know" he was "seeing" his ex wife. His ex wife has borderline personality disorder and is an alcoholic. I can't stop playing scenarios over and over in my mind.