I've made the very painful decision to try to formally and in a mutually acceptable manner end a friendship that was originally really good and really close but has over the past year and a half or so become really strained and interfered with my ability to live my life. But I haven't talked to the other person in a couple of months anyway, so first I need to get her to respond to the email that I sent her asking to restore contact so that we can actually have a conversation about this.
Huh? You haven't talked in months anyway, so... just keep on not talking. Am I missing something here? People don't usually "formally" end friendships in real life.