I don't think the ins and outs matter.
Regardless of whether it is him at fault, or you over reacting ...something in the equation of you+him..... =you losing control.
And your kids don't benefit from a mother losing control, or being eaten away at real/percived slights and selfishness.
Maybe take some time out from relationships to focus on working out what you need as a firm line in the sand in a relationship, so you'll be less inclined to settle for less than your absolute needs in the future.
It is also giving it time to let the dust settle on your immediate hurt/loss in order to work out what might be "hair trigger" pressure points for you in a relationship.
I was a huge bit of a basketcase after my first marriage died, which just added to my pre-existing abaondonment issues. For a while there any relationship I had was doomed to fail becuase I was reacting to real, past hurt by triggering at immagined hurts. The best thing I did in my "getting over original issues AND DH 1.0 issues" process, was taking time out of all and any relationships to let my wounds heal.
It took a concerted effort (and lots of "people in relationships" watching) to learn what minimum baselines I needed. Then I had to acquire the will to chop a newly sprouted romantic interest dead the second I saw signs that there was a missing element I could not do without.
And
If it makes you feel any better, back in the day I had you soundly beat in the "totally humilate self" stakes. Pain, loss and grief can leave wounds that need time and attention to heal well. I couldn't heal as a member of the walking wounded while I wasn't wholly concentred on getting better as pre-requisite to getting back out there. If any of that rings a bell, then picking you and your need to recover might be your best foot forward.