My ex is mad at me. How do I get him back?

My ex is single again and I want to try and get him back. Problem is he is mad at me because he's blaming me for ruining his relationship. I didn't do anything. His girlfriend saw old photos of us together on his phone and got jealous but we were together before he even knew her.

How should I try and reduce his anger? He looks at my facebook but doesn't speak to me or reply to me.

My ex is mad at me. How do I get him back?
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