What to wear if meeting the ex for drinks?

Anonymous
I'm meeting the ex again for the first time after the breakup (about 8 months ago and he dumped me). We are just going to a bar for drinks and I don't know if he has a new girlfriend. We still managed to stay friends after the breakup and chatted occasionally this whole time. It isn't a date of course but just to catch up.

I know it seems a bit silly but I want to look good for this meeting. Any suggestions on what to wear?
Updates
+1 y
I guess my objective is to make him regret his decision. I know he probably doesn't because if he did, he would already have taken me back but I DO want him to feel at least something.
What to wear if meeting the ex for drinks?
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