Yeah, ENFPs won't really stay mad at you... I'm really sensitive and I probably would have done the same thing. Then I would think, maybe it was my fault, and feel guilty and sad. I might not forgive or forget what you did, but almost guaranteed that within a month, we'd be fine. Just call her as soon as you can and say that you didn't mean to hurt my feelings and end it there. And also, don't say anything like, "But you really should not have been late." or whatever. That would just negate the fact that you didn't want to hurt her feelings. Maybe you can make a nice joke and or talk about something that happened at the place you went to. Like, what she thought about it and stuff. You could invite her somewhere after you talk
If you don't think you should apologize or anything, it is totally fine too. She will probably get over it within a month if not a week. Just a matter of how you want to go about it. I'd do the first, but whatever floats your boat!