(will delete soon)

I am a student from europe. There was this exchange student at an academic christmas party. We chatted a bit and played games. It was just small talk. He later messaged me telling I was pretty and asked to show him around and teach my mother tongue. I said I was busy.

Later, he wrote to me again during the break, asking what was the address of the building of my faculty (where I study). It was creepy. I ignored. Now he's asked in our university chat who is the head of my faculty (he has nothing to do with it). I wanted to screenshot him asking where I studied (just in case) but he deleted all the messages. I'm afraid he may stalk me or even worse. I don't even know what to expect because he is from a different culture. What can I do?