What does he mean by this?

he texted me and told me that he’s not leaving his wife. he said “so the last shall be first”.”you and the other girl kept trying to make me block one another, but it was neither of y'all that I’m in love with. My wife wasn’t a secret. You passed around lies about me saying I was in love with you both. In reality I loved my wife through all of you because I knew neither one of you could amount to her. I want to give my wife her first child, our first child. I wasn’t in love with you and I continuously told you this. You and another woman kept fighting over me but in reality I was just waiting on my wife to get back home. She wasn’t a secret and I wasn’t staying with nobody. I wasn’t staying with you or the women that wanted to take me from my wife”. “Again, the last shall be first and the first last”

he told me not to contact him again

What does he mean by this?
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