When a person is engaged to an emotional abuser how do they get out of the relationship?

First and foremost,make yourself mentally strong.Don't get swayed away by the sweet talks of your abusive partner. If you are financially independent and if you have made up your mind to end it then just go ahead and tell him.If you do not wish to communicate this to him personally,tell him over the phone or write to him. Yes, you should know that this is the right time to break away because after a period of time,it can also turn into a physically abusive realtionship.So,protect yourself from future harm and heart-break. If possible involve your parents and friends in your decision and in their presence you can convey your intentions to him. Emotionally abusive realtionships cann be really bad.After a point of time,you will lose self-confidence,self-esteem and you will start feling worthless.And also you will hate yourself for putting up with somone who could abuse mentally,verbally etc. After breaking up with your partner, he or she will not necessarily leave you alone. In fact, the chances are extremely high that he or she will try to convince you to get back together. The best thing for you to do is remain distant on a continuous basis. Make it seem like you don't know what's going on in your life, that you're just confused right now. Make it so that your partner, or ex-partner in this case, will have no way of feeling like he or she can control you. Control lies at the foundation of abusive relationships and this is why your partner abuses you. So, don't argue with him or her, let him or her lose interest in you. If it gets severe, you may stop answering calls, you should break all contact if you are emotionally vulnerable to his or her manipulation. The worst case scenario, document all his or her attempts to contact you and attempt to obtain a restraining order. Good Luck!