Should I hear out my ex girlfriend?

I'm gonna keep it short and sweet. I got outta judo class, and saw a text from my ex girlfriend who left me for another dude. I literally dropped my phone cuz it flat out scared the crap outta me. We ended after she hooked up with him while we were dating and then just left. No goodbye, nothing. I haven't responded yet, but part of me wants to be fair and listen to what she has to say. I know it may seem obvious to you guys. But why would this happen? I sorta need some outside feedback. All I ask is that you dont be vulgar in a derogatory way or insulting.
Should I hear out my ex girlfriend?
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