1. it is not your fault that he didn't communicate to you that he will still be busy on the dates you booked, he bigs this up as a big deadline and if the deadline changed then he should have told you 2. you were willing to compromise on dates to accommodate him, but it sounds like he was too flooded to acknowledge that 3. give him a chance to reflect on things a bit, he might see how unreasonable he was 4. you also have a busy stressful life and you're trying to behave well, so should he 5. he ASKED for those texts when you asked if there was something you could do to support him, to throw them back at you is just cruel (maybe because they DO actually mean something to him?!) 6. don't believe what someone says when they're angry 7. he doesn't hate you, change that script 8. you're in a very unusual situation having asked him to move out, but so is he. Give yourselves both a break. Calm down and see where the land lies after you've both reflected
I'm so sorry things went badly 