"My phone got wiped and google apparently wasn't backing up contacts. Not sure who this is but I've exchanged texts with this number. . ."
How do you have my number in the first place if your phone was wiped out and your contacts are not backed up? And if all he has is my last text message to him then why would he respond to "someone" calling him a monster? It just doesn't sound right. I'm strarting to thing he said this so he couldn't start some sort of coversation with me. He's not going to send a "I miss you" text. He's notorious for those and I've already called him out on it in the past.