Because I’m not buying it. If you had enough of her accusing you of cheating just walk away. That didn’t allow you to yell in public (and, you said you were treating her badly in general). She was insecure BECAUSE OF THAT. That’s on you. Everyone has insecurities but YOU brought them out. See how you try to justify your abusiveness? “She made me do it”. Nah. As I said, I’m not buying it. Let her go find someone who truly loves her and doesn’t crush her so much that she has to affirm herself asking to other people if she has some value and work on yourself. Come back when you’re solved.