How many times should you forgive someone for stealing from you?

My boyfriend stole a gold and diamond necklace from me and pawned it before I knew he was very sick. We broke up and several months later, when he apologized and said he was in treatment and was recovering, I forgave him. We did go through the court system and he promised to make restitution to me for what he had done. We also were in counseling, both individual at first, and then we started couples' counseling. After several months, he began deceiving me about what he was doing with his money, where he was spending his time, etc.; then he began taking money from my wallet. He always said that he was working on his problem and that we were in counseling, so I gave him a chance to redeem himself. However, when I noticed more money missing, I checked my jewelry chest and noticed more jewelry missing, too--a gold and pearl necklace, and my gold and diamond cross pendant necklace. I kicked his butt out of my life and told the slime bag I never wanted to see him again and that he had better never come near me ever again or I would get a restraining order against him. He had the audacity to tell me that he took the jewelry a long time ago and acted like I should just blow it off. He also wrote to me and tried to put a guilt trip on me for causing him to behave the way he behaved because I "got into one of my moods." I already know I did the right thing by getting rid of the parasite, but I guess I'm asking whether there are some people for whom there is just no hope. Do you forgive them and keep praying for them, even though it seems like they'll never admit to their faults?