Why did he never talked to me ? now he lost his chance 😳

There is this guy that likes and I like him back but he never talked to me in school .I used to see him in first semester but he never talked to me he would just stare at me he would talk to other girls in his grade except me. I never talk to him because I'm too shy he knew I like him now for second semester I won't see him no more because they change my schedule why did he never talked to me ? when he likes and knew I like him back ?😳now he lost his chance because I won't see him no more 😭😳and deep insides it hurts and just want to cry 😭 😔