Do you think I should trust this type of friend?

I was involved in a same relationship with a woman. At times when things went wrong between us, she would threaten to blackmail me in some way. For example, She would threaten to walk into my job to tell them I was . She threatened at one point to tell my family about us and embarr me.She has a tendency to use personal information agaisnt you. I ended the relationship between us. It was hard for her. She was a mess and threatened to shoot me. Then she apologized and insisted on being my platonic friend. I confessed to her that I didn't really want her friendship; however she broke down again and insisted that she would be destroyed if I wasn't her friend.I felt sorry for her and accepted her friendship. I noticed she is the type of person that sticks to you like glue,very clingy. She likes to meet regularly, sleep over everytime she visits and even came on to me one night despite the fact that I told her I don't want romance.She at times acts like a detective. My gut feeling tells me not to trust her. I have not been able to tell her my new address because I don't trust her. Something tells me not to bring her to my home, and lately I have been slowly distancing myself from her; however she still calls. What do you think is going on here? Do you feel that I should trust her? Do you think I should tell her where I live?