Random guy blocked me on Instagram ( I never talked to him he goes to my school but is a grade higher than me) what did I do?

There is this random guy who goes to my school he is one grade higher than me I’m 16 he is 17 I never ever in my life talked to him once DONT even know who he is until I had this app who tells you who blocked you I went on it and for some reason the app told me this guy blocked me. I went to double check on Instagram and it was correct he did block me. I never talked to him once nor do I know him? Anyone knows what the is the reason for this?

Random guy blocked me on Instagram ( I never talked to him he goes to my school but is a grade higher than me) what did I do?
Post Opinion