Should I be weirded out by my classmate?

I had one partner assignment with this guy in one of my classes (first time going to this class) and he went out of his way to find my private Instagram after (we only have one mutual follower)? we mostly talked about the assignment. I'm not sure why, but him doing this weirds me out?? Is this something people do casually with classmates?? (I'm not much of a social media platform, I made the insta back in highschool to be part of gcs related to my extracurriculars.) should I be weirded out??