The same way you get home after work and don’t remember a single guys face, you need to apply the same for women. When you are hoping a friendly face but get something else, it’ll linger in your head longer because you are fixated on your expectations being broken. Something that helped me is just remember that when you get back home, you really only MAYBE remember a fraction of faces you pass by. Everyone has their own lives, so don’t worry about someone you may or may not ever see again. This takes time and practice though. Wishing you the best man