You have great instincts. You knew he was lying. Your first instinct was also to go take care of yourself. That's badass. You're not going to let him get away with shit as you go through this.
I'm really sorry he treated you this way. It's unfair to waste another person's time and affection in this way.
I’m so sorry you’re going through this. I also discovered my exH was cheating on me by inadvertently seeing a text on his phone (I had picked up his phone to look at the time and there was a text on his lock screen).
Your emotions right now are probably all over the place, but allow yourself to feel your feelings and only you know what will be the right decision for you.
I hope you can find some peace because I know the rage can be all-consuming! I also hope that spending some time with your friend will help you navigate this. You are in my thoughts!
I'm glad you found out the truth. i'm also glad you got out of town and have some space. Hopefully, you will realize that you and the kids absolutely do not deserve to be treated like shit and figure out a plan asap.