You might not be strong enough to compete with him or her either financially, or he/she has a strong connection with the law enforcers. As he/she has refused to sign the divorce papers? At this time you are really tired of his/ her behavior or whatever it might be that he does to you. You want to move on with your life, you want it to be over for the two of you, you want out of the marriage out of the relationship. 

You want a life of your own or maybe you have found someone who respects your feeling and also respects you plus he or she appreciates you as a partner and gives you all the attention and love you no longer get, he/ she takes complete care of you, maybe you want to run for your life he/ she is becoming a threat to your life.