My crush for three years

Theres this person I liked from 7th grade let’s call him A we used to talk and mess around and that’s when I started liking him I told one of my friends we got in a fight and she told A that I liked him I don’t have him on Snap Instagram or anything should I ask him what’s ur snap Bc I feel like he might stop talking to me Bc of what happened I see him in the hallways walking right next to me but he doesn’t wave hi what should I do