I don't think you can decide to forget. You can choose what to go into denial about, you can choose to avoid thinking about something until it's forgotten and replaced with new information, but I don't think it's a simple or easy process for a majority of people. If it were, I don't think some parts of trauma would be as difficult to deal with, as we can just choose to forget about our terrible experiences.
I guess to some degree, you can, though, just not in the way most would think.
I guess to some degree, you can, though, just not in the way most would think.