Husband cheated with my friend 😩

My husband cheated on me with my friend and knocked her up, we are divorcing and come to find out they’re engaged. I’m completely and utterly heartbroken. We also have a child together and he doesn’t see her or call her, as he does not want her anymore. He’s deployed now so it makes things a little easier for our daughter since she just turned 2, but breaks my heart none the less.

Need help on how to fully get over him :( do you think he will cheat on her?

I went to his chain of command and they didn’t do anything :( I sent pics and all the proof and even went to the inspector general and nothing happened as the unit lied to cover for him