I am usually in some form of contact with all my exes even if infrequent. But sometimes it does need to stop. I think I need to stop talking with my last ex as he isn't over me and a year later he isn't losing hope but I am already with someone else. I continue talking to his daughter as we remain close. But I might need to stop talking to him as to stop him from
Having hopes and protect him from pain. Maybe your ex stopped communication to protect you from having hopes. I know it sucks.

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