Girlfriend cheated and is mad at ME?

I found my girlfriend sending nudes to a dude while we were still together. We broke up, got back together, and then I found out. She happened to sleep with him as well She lied the whole time. When I found out I pushed her down a short flight of stairs and I broke her phone when I found out. We were supposed to move in together. I felt a lack of emotional support and was really sad towards the end of our relationship. She had the audacity to be mad at me! I take responsibility for all of my actions... But any thoughts?
Girlfriend cheated and is mad at ME?
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