Please help me out😞

Hi so I’m a junior in high school and there’s this boy and he makes me extremely uncomfortable. I have two classes with him and I always catch him staring at me (during both classes). Once the final bell rings I basically run out of my class so then he won’t see me and walk next to me but somehow ends up next to me????? I speed walk and to try to get rid of him but he just walks faster😣 honestly I’m scared of this guy (keep in mind that I’ve never spoke a single word to him) and I try to stay away from him but he ends up finding me. Any tips of how to make him leave me alone???