It does get easier, in one of two ways:
You close into yourself, for a while, letting the strings and ribbons they tied around your heart fall off. Then you can breathe again and all those places feel new again. The past isn't changed but the way you absorb those places, those sights and smells, isn't going through a filter made of that other person anymore.
Or you close into yourself, for a while, hiding backstage, with the dust and used costumes, until you find a mask that looks close enough to you that it just might fool everyone. So you put it on and you walk out on stage. And everyone applauds and throws roses. You bow, you've done it.