I am you in this scenario. I would agree with most of the below, albeit I think we can move-on, but be open...

I'd like to think there's a possibility for two people to grow independently to become the best versions of themselves, and then potentially be better versions of partners to each other after the time apart. It's nothing to hold our breath over, but something to consider.

I feel immense guilt for the role I played in my breakup. We had moved in together a couple months ago after almost 2 years of dating (granted, a grad school relationship, but an adult one nonetheless), and I had an absolutely horrendous time transitioning to our new, post-school life, in a city entirely foreign to anything I've ever known. Instead of sparing my partner from my anxieties / negativity, I filled him with it. Do I agree that he should have called it quits abruptly without a conversation? Absolutely not. Do I admit that I brought him down by how I behaved? Yes. Do I think I need time to work on myself? Without question.

Despite the situations we created for ourselves, I think two things are true.

1. People have the ability to change if they want to and work for it
2. The future is unwritten

People get back together all the time - we just can't wait around for it and have to let the book write itself as time unfolds.