I had an ex roommate who I continually thought of reading this. He never got violent but he was a classic stalker. Of course as soon as he would slow down on the stalking behavior the girls would initiate contact again. His previous roommate and I always laughed because his gf's were generally pretty hot looking but they were bat$**t crazy; not always obvious at first but given a few weeks it came through.Find a Codependents Anonymous support group nearby and go several times a week until you have broken your addiction to him. He is BAD for you. At the CA group you will learn to love yourself and be your own best friend and protector.