I’m a freshman in high school and at my school the IB kids makes sandwiches every friday for homeless people. The teacher who sponsors it lets me help too and gives me service hours. Today I was waiting for my dad to pick me up after and this guy comes up to me. He looked like he was a senior or a junior. He started going on about how I looked lovely and I immediately felt uncomfortable and asked him to please stop talking to me. He gets mad and asks me how I was gonna help homeless people with my attitude and walks away to complain to one of his friends. 

AITA for asking him to stop or his just a “nice guy”?