What should I do in this situation?

A bestfriend of mine (we met online and not in person) and I had a fight last night and she blames it all on the mood swings. I understand about her mood swings but this one just went a little far away and she won't stop taunting me about it. I've stopped talking to her and now I don't feel good about it coz she was the only person who I used to talk much about my life everyday and now that she's not there, things are piling up in my head.

What should I do in this situation?
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