It seems that I am an authorized user in some of my ex-boyfriend's accounts because they are negatively reflecting in my credit report. I am no longer in contact with this person and we are not in good terms. What can I do to remove his accounts from being reflected in my credit report? I appreciate any help that you can offer. Thank you.

Have him call the company and have himself removed. I had that in the past, and that was the only way that he could be removed.