What should I do if my ex’s female friend wants to be friends?

I met her through him and she invited me out this past weekend. I guess my ex didn’t tell her we’re broke up because she was shocked.

but she still wants to be friends. She told me this sucks because we all like you. But at the same time invited me to her birthday party where she told me she also invited my ex.

She’s a cool person but ultimately I don’t want to go to every group event if my ex is there. I’d

is it messy?

What should I do if my ex’s female friend wants to be friends?
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