"We were in the same class"

We were in the 8th grade, and it was an ordinary lunch break. Class was almost completely empty. He suddenly sat next to me. We were friendly but not close. He did not even start a conversation, so I just kept reading my book. Suddenly I felt a hand on my thigh. I thought that he accidentally touched, so I just moved a little. No matter how much I tried to make space between us, you kept touching me. I was too embarrassed to say something because there were other people in the class. I did not want them to know. I did not want people to think I was overreacting and weird.