I'm expecting a call from H sometime today. He texted and said that he wants to share something that is on his heart, something he feels I deserve to know. In case he comes cleans about the OW whom he has been dating for about 2 months and is in love with (found love letter), how should I respond? If he says something about filing for D, what would be a good response?
I would stay calm (break down later if you need to, scream and yell at your pillow). Listen and empathize, you do not have to respond to anything immediately. You can let him know you do not want to respond right now you want to think about it first. Come here and post what is said before reacting.
You can not change your past, but you can ruin a perfectly good present by worrying about the future.