I feel guilty since a few years ago

go back to a few years ago ,i feel irritated on stranger (who are older than me)when they make a irritating behavior actually they made a small thing i know i should calm down but i show an angry expression to them so i feel guilty since a few years ago until now a days although im calmer than i used to be , if i meet them again i wanna apologize them but i cant remember their face😭 and now when some people say "ur a nice person" i feel uncomfortable bc i used to be a bad person so what should i do , i dont wanna feel this way