I didn't accept it for a couple years. My dx initially was Bipolar 1 w/ Psychotic Features then changed to Schizoaffective Disorder Bipolar type. Most of the first year I was dx'd I was in psychosis so I didn't have any insight. Then after I did I still denied that I had it or I'd get to a point where I'd do great on meds then convince myself I was cured or didn't have it in the first place get off the meds , become unstable and repeat. That cycle went on for about a year. Eventually I accepted , it took quite awhile though and many cycles of becoming unstable before I did. I fully accept it now though. The initial dx was 8 years ago.