Has it been medically confirmed that your boyfriend is bipolar? If so, is he being treated? If so, is the treatment not working? You deal with a broken heart one day at a time. In this case, you are dealing with a mental illness. Until the illness, one that is not curabe but managable. Unfortunately, your heart will get broken again, many times if you chose to stay with someone who has mental issues such as this. It is the disease that is causing the problem, the person who is trying to deal with it is hurting as well. If you decide to contine, please learn as much about the illness as possible and be parpared to go through ups and downs, and practice much patience.