How do you win an ENFP back?

A week or so ago, I had a momentary freakout (I was calorie restricting and unusually moody) where I cursed at my ENFP boyfriend over text because he woke up over 6 hours after the time he said he'd be picking me up and went about his day without telling me he wasn't coming. It was only a few short messages and I feel like I didn't even say anything that bad ("Fuck you and fuck how you treat me", "we're honestly over") but I apologized profusely because I miss him and understand that things that wouldn't hurt me might hurt him. He says he doesn't know if he wants to invite someone who would be capable of suddenly wanting to break up into his life.

How can I win him back? I've let him have his personal space since he's said he's too busy to really process things and I don't want to come across as overbearing. I'm ENTP (and just otherwise emotionally challenged) and don't really know what to do. It's not like attacked any of his personal traits or how he is as a person so I don't understand why just saying we we're over was such a big deal. It was the first time I had been mad during our entire time together, too. I've told him I'll explain my feelings the next time instead of trying to immediately jump to closure but he's still not forgiven me.