A fb friend request? ?

My ex and I have been spilt for a month now. He deleted me off his fb and we haven’t spoke for a month. The last message from him was some thing like... why keep talking with me and making yourself ill if your not happy with what I do?
He has lied many times , broke promises and had many women he associated with. So... today I saw a friend request from him on Fb... why would he friend request me and not text me or Fb message me? What’s the purpose of this when he broke up with me? When he deleted me off fb before our break up?
A fb friend request? ?
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