Creepy Night

I went out to ride Twilight a couple nights ago, it was getting late, the sun was going down and I was there by myself, with a hired worker who seemed new to the ropes. I'd never seen him before anyways.
I was really anxious to ride Twilight because we had a lesson the following day and I wanted to do well. I saddled up and went to ride in the indoor arena. I was not in there long before I heard the hired man's truck pull up next to the arena. This was not unusual, he was transporting hay from the back stacks to the front.
  I trotted Twilight past the entrance to the indoor arena and there he was watching me, I circled the arena three more times and every time I went  past he was just standing there watching me. I felt fear twisting its way up my throat, I took out my phone and tried to call my family members but no one would pick up.
  I didn't want to end riding, I wanted to keep going but I felt like a rabbit in a cage. So as quickly as I could without appearing scared I took Twilight back to our trailer, unsaddled, gave her to apples from our tree at home and released her to her pasture. I had made sure to turn off the arena lights when I left the arena, but when I went by again, I saw he had turned two of them on. The girlish part of me that was absolutely terrified was shrieking its a trap he want you  to think you forgot to turn them off and go in there. The other part of me was saying, he is just working in there. But when I went by again, the lights were off, needless to say I fled.
Sometimes I really hate being a girl, I don't know if there was a legitimate reason for me to be scared I could have just freaked myself out for no-good-reason-what-so-ever-other-than-to-ruin-a-perfectly-good-ride, but how could I know?