Will I ever be able to forget/accept the things I know that I shouldnt?

Ive been struggling with retroactive jealousy since April and my girlfriend understands. This is a good and a bad thing as she is kind but also does answer a lot of the questions I ask. I have taken the questions way to far, asking things like which film she watched with another man and whether their bodies touched topless.

I am in therapy and trying to do better but im struggling to change the way I think. Even if I do, I know so many details about her life before me that I cant even hold her hand without getting flashing images of her holding another man's.

Will my image of her ever be back to the way it was? Can I forget about the things I know? Even if I stop asking questions will my mind ever be clear of the thoughts I have?