Fashion student worried about being rude

DEAR HARRIETTE: I moved away from my small town in Ohio to go to fashion school in New York City. When I was out and about, a girl stopped me at the train station and asked me who I was. When I confirmed my name, she exclaimed that we went to school together and she graduated a few years before me. We chitchatted for a bit about how we’ve been before going our separate ways. She said we should follow each other on social media to stay in touch if needed.