I'll be the asshole here and advise against getting back together or trying to. I was in a similar situation where I was broken up with for a minor reason/lapse in mental judgement and I wish we had stayed broken up. Instead, it led to being years of trauma and abuse.

Unfortunately his trust in you is pretty broken now and if you guys get back together he could have the anxiety of, is she gonna break up with me again or will I have to walk on eggshells around her?

Sure it's anecdote and your results will always vary. Rooting for both of you to find peace but I don't think it'll be achieved together.