My safe space has been ruined for me

My safe space was recently ruined for me. I am a female high school student. I frequent a library that is not too far from my home or school, but still an effort to get to. It is my safe space. At home I am not always safe. At school I am not always comfortable. The library has been my go-to recently, I study, or read, or sleep, or scroll Instagram there, whatever I happen to feel more like doing. I am grateful that I have found a safe space for myself, though, I feel it has been ruined for me recently.
I went there after school about a week ago, I was finishing off some homework. Everything about the day was normal, and when I got there that afternoon, it all felt normal. I had my laptop plugged into a nearby charger, and tried my best to make sure no one would be able to trip over my charger. To my right I hear the scooting sound of an electric wheelchair. I glance over to see a man in an electric wheelchair browsing some books, and I make sure none of my things could get in the way of him. As I moved my bag over a bit our eyes met only for a second, before I got back to my work.
After about 20mins, I notice his wheelchair has remained stationed at my left for quite sometime, facing towards me. I figured he was reading a book or something and risked a glance at him. He was staring straight at me. I went back to my work. Whilst it felt embarrassing, as I didn’t want him to think that I was just staring because of his wheelchair, I was kind of confused as to why he was just sitting there. He didn’t have a book in his hand, or anything else for that matter. He was just sitting in his wheelchair, staring. It hadn’t occurred to me at this point that he was only staring at me, and not out the window or something.
Two hours or so goes by, and I am eventually done with my studies, and pack up. I wasn’t ready to leave yet, but I was done at the table I was at. I packed my bag, and headed towards a section of the library where a book I was currently reading was located. As I stood up and walked away, I notice that the man was still staring at me. I brushed it off, figuring that he was just lost in his own thoughts or something.
As I’m grabbing a book from the shelf, I see his electric wheelchair fly past me. He was sitting in that same spot next to me for two hours, and just so happened to have enough when I leave? I started to get creeped out, and hoped he didn’t see me as he went by. I’m on the second floor of the library. And I thought I saw him head towards the elevator to leave, so I sat down on a couch to read, and then I see him. He turned around, and started, almost patrolling the isles of books. I try to hide my face, to shrink into the side of the couch, but I saw him notice me. I saw him stop. The back of his wheelchair pocked out the side of the bookshelf and he leaned back to look at me. I tried to read, hoping he’d go away.
I eventually tried to listen to music on my phone. Plugging in my headphones, and attempting to listen to spotify. Some error message popped up each time I pressed play on a song. Spotify kept on refusing to play, and through the corner of my eye I see the man move towards me. He stopped next to the couch in front of me, and I didn’t dare look up. I gave up on my music. And kept my face pointed at my book, though I could not read it. I don’t know how long I sat there for. Eventually it all became too much for me. I stood up abruptly. marched to put my book back in it’s place. And almost sprinted towards the stairs.
I stopped just as I started down them. I heard his wheelchair moving again. I took a few steps up to see where he was going. I could see the little neon orange flag attached to his wheelchair moving… towards the elevator. I think it was then that I lost feeling in my legs. I would’ve tripped running down the stairs had it not been or the hand rail. And as I exited the building I ran to my bus stop. I ran past it, towards the next one, and finally stopped running at the one after that. I stood there, shaking in fear, my legs utterly numb, my hands shaking, folded under my armpits, utterly terrified.
Then the bus came. I went home. And I went to sleep.
I went back to the library with a friend two days after that. And I hated it. I was paranoid. Terrified. Completely on edge and out of it. I couldn’t even stay for an hour. Now, I’m avoiding going back.
I think the worst part about this is how I don’t feel like I’d be able to tell people, because this man was disabled. And I could outrun him. he could’ve had a mental illness that I wasn’t aware of that caused him to stare. because he didn’t actually attack me, or touch me, or even talk to me. Yet I was still so scared. And I still am.