Feeling uncomfortable at work

I’m working in a shop for a few hours a day (for my work experience for school) but today I felt really uncomfortable. I know the owner of the shop for a few months now because me and friends are always in there buying food. But today we were talking because it wasn't as busy, and he touched my knee, like tapped it. I felt really uncomfortable as he is a 30 something man touching a 16 year old girl. Threw out the day he was calling me "pretty" and "perfect young girl" to work here and I should consider modeling. Later on that day he offered me a sweet and I said "no I'm fine" and he put the sweet up to my mouth and I bit it and grabbed it and ate it, I told him could I go home as I felt uncomfortable around that point. I'm really scared being around him now because of this incident. I want to know if I'm over exaggerating or he shouldn't be doing things like this.