Primarily agree with MrB here.
But also, IF you actually consider taking her back think long and hard about what you would require.
New job, IC on top of MC, dating before move in etc etc
Having those requirements set may help you draw the line.

But IMO: no kids + OM = you file

Me: 34
Stbxw: 30
D:5 D:3
Mini bd: May/June 2019
Married: Aug 2019
BD: 6th Dec 2019
OM Confirmed: Feb 2020
March 2020: I filed for D
Waiting for D to be finalized and W to move out end of January 2021