Ok, I agree with all of the advice so far. Reread it, ok? You ARE still a little mad, even if you had no intention of dredging the past up again. You slipped. Your insecurities and anger got the best of you for a moment. You're human and you're a human who was hurt and is scared of getting hurt again. But, it's not how you want to be, not how you want things to go, so **if** you feel like it's best to say something, say about 1/4 of what is in the email. Tell him you're sorry, it was uncalled for and came out of nowhere and the reminders are there, even if you don't mention them. Then, make it all good. You are looking forward to him coming home, with no R talk, etc. Switch the mood to excitement and happiness, b/c you BOTH need that right now and deserve it.
Good luck! We're all pulling for you and excited for you guys!