Why I can't talk to my ex even she tries but I can't say anything?

I broke up with her week ago she was lying in my face coldly. I protected her I was very kind and good for her but she drive me crazy with her lies and I reach point I can't say anything anymore I can't whatever she say can't answer her or talk her or see her she asks to sit and talk I can't after I felt betrayed I just want to be far from this woman I gave all my best and I was faithful but i got betrayed I had to change my phone number because I blocked her she contacted me from other numbers

Even now I write this and talk about it I feel pain is that normal?

Why I can't talk to my ex even she tries but I can't say anything?
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