I have read that this is common. Some people just start feeling better between episodes, it is easy to think that you are ok and that you no longer need to be treated. Other people like me simply refuse to believe that they are Bipolar. We remember better times, when we felt stronger and more grounded. We are painfully aware of the stigma surrounding Bipolar disorder. We just don't want to believe that we are sick.
So I read, I inform myself, I read about the symptoms over and over until I finally see reality for what it is, not for what I want it to be. It helps me, until the next time I start thinking that I might not have Bipolar Disorder after all.....
Sometimes I wonder if I am in denial But there might be another explanation for this. I found a very helpful article that helped me understand a little better why I sometimes choose to deny that I have Bipolar disorder.