Just need someone to understand

So back on April 12, I was flying home from a work trip i went on. I was alone. In the airport, this strange guy kept looking at me and never really took his eyes off of me. We get on the plane, I find my seat. It was a middle seat in the back of the plane. The guy gets on the plane and he can’t find his seat and ends up sitting in a bunch of random seats and keeps getting up. In my head I just keep saying “please don’t let your seat be by mine” A flight attendant comes back and asks if he needs help and he hands her his boarding pass. And you guessed it, it was right by mine. So we’re sitting there and right when the pilot announces we are about to take off, and the seatbelt signs turn on and no one is aloud up, the guy reaches over and grabs my arm while looking directly in my eyes and moving his body closer to me. I said no thank you please stop and moved away from him and he let go. I then opened the notes app on my phone and typed up what had happened to show the flight attendant and I asked if there were any other seats I could sit in. They got me a new seat and I sat there the rest of the flight. When we landed, they hid me in the bathroom so that there wasn’t any contact between us and then the flight attendants walked me to my mom who was picking me up at the airport. As soon as I got to my mom I gave her a hug, and the guy was standing right there and tried to come after me. I started screaming and crying. Police and FBI got involved. Turns out the guy lives in the same city as I do. Now I feel unsafe no matter where I go and always have my pepper spray by my side. I keep having nightmares. And I don’t want to sound crazy, but i don’t see the part of my arm that he grabbed the same. It feels numb. I hate that I have to live my life in fear not knowing where this sick perv is.