almost three years ago i was sexually assaulted, my ex pinned me down and did sexual acts on me without my consent. it really affected me a lot and now im in a new relationship (together for 2 years) and he doesnt understand that when i say no (for other things like being tickled or if i dont want a hug), and he does it anyways that it reminds me of that night. he gets mad at me for bringing it up because he doesnt understand why i remember it. how can i forget it or help him understand?