Is 3 months too soon to start hanging with ex again?

We have the same friend group so I’d be seeing this boy weekly. I’m talking like 3x week. We said we were both cool at breakup & could be “friends”, but we barely talked about it after. It’s now been 3/4 months no contact and they all wanna be hanging again.

is this a good idea or should I wait? I brought it up to him that it might be awkward but he was confused, because he’s completely moved on
Is 3 months too soon to start hanging with ex again?
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