I get so triggered when I watch a video about someone's story with a naricissist

I came across a movie recap about a lady who dates a youger man. He turns out to be a malignant narcissist and a criminal who absolutely ruins her life and tries to end her. It's difficult to describe the fear I felt when I watched that. I remembered the PTSD my covert narcissistic ex gave me at the end of our first year together. I would wake up scared and I didn't know what was happening to me. The confusion he gave me. I felt like I was going crazy. I spent months literally crying everyday

This movie reminded me about how he'd 'joke' about ending me. I hope he remains as far from me as possible. He texts every now and then, to tell me about the latest great thing happening with him. I pretend like nothing happened and congratulate him, but I don't act overly excited or anything. I try to gray rock. I hope he stays away and cotinues to get farther and farther away from me. It was a painful experience but I feel like if I hadn't had this experience, I would've married someone like that, I would've continued to disregard my gut feeling... now I trust how I feel more