Is this stalking?

When I was 12, I knew a 15 year old that repeatedly sexually assaulted me. Well he also looked into my bedroom window one time (could’ve been more, my friend only caught him doing it once though), waited for me to come home from school at the school bus stop, and sometimes he’d walk beside me while I walked home and ordered me to drop my bag by the door and come with him. Somehow knowing what it helps me but I don’t know if that’s classified as stalking.