I assume your wife separated from you? If that is the case it will have to be her who is both convinced you have changed for the better and who is interested in trying again. If she met you before you were diagnosed and spent a lot of time with you then, she might have gotten something out of your being bipolar, as well as it hurting her, and, even if she finally decided to separate from the unchanged bipolar you, she may not know how or want to connect to the changed you, you will be unfamiliar to her?