You're a smart woman, TOC. You will be fine I think.
Most of us BSes wanted an apology. Some of us got it, some didn't, so I get that. I also get that the heart follows the head, but at a remove.
Honestly, the apology will probably make you feel better. You'll get the sense that he understands what he's done and is truly sorry for doing it. That'll be a good feeling.
As for being worried about how he'll take your overseas job announcement, well, TOC - you are a good woman and a kind and caring person. Remember, though, he fired you from that job.
Here's one more nugget to think about: Are you doing just a bit of pain shopping? Dropping yourself back into some of the old habits because they are familiar? Trying to ease everyone's pain when it isn't quite your job? Do note that that last question is about an action that is perceived as good and noble in our culture. That doesn't mean that it is the correct action for your healing, but it also doesn't mean that you will be harmed by taking it.
Best of luck, TOC. I've read a few of your replies to other posters and they're always spot-on in my book. Do please consider hanging around in future, the wording up above could be interpreted to mean that you don't think that you will.
Have a happy new year and a great life.