Yes people do get out the other side.
Bones, I mean this in the nicest possible way, you really must step away from the texts, the emails, and try to detach.
You're only a few months in, it's raw and hard and horrible. I know how you feel, sadly too many of us on here know how you feel.
But I'm going to be tough here, you're not helping yourself. You ask in one post how do you move on, then in the next you say you've emailed everyone to tell them the truth. I get that you want people to know it, but stuff like this is putting you a step back every single time.
You can stay exhausted, going round and round in circles eating yourself up about this for as long as you please. Or, you can force your thoughts to other things whenever he pops in your head. You can send emails, fret about what people think (stuff 'em!) or you can plan the future. There is no magic cure for a broken heart, but you can help time heal, by living in the present, letting the past go and simply taking control.
If you really want things to improve then listen, please. Only business like emails, texts about the kids. Nothing more, minimum contact. No more letters, emails, declarations of feelings, questions.
Let him see the strong independent you emerge. Let your kids see her too. He's not worth all this angst.
Stop dwelling in the past (it wasn't great, so why revisit?) and worrying about getting back with him in the future. Focus on the here and now. Today. Your kids. You. By doing this, by letting go a bit, you will really heal.
I wish you well x