It’s okay to miss them.
I think of all the losses that come with dealing with infidelity. You lose more relationships than just your relationship with the Cheater. The family and friends loss are big losses as well.
Now, I understand that many of these people reveal themselves to not be true friends. Yet, many of us still have positive memories with them. So, it is still a loss.
It is okay to miss them, to grieve the loss.
Grieve with boundaries.
I would still suggest not letting toxic people back into your life. Do not allow them to trash your heart again. If they are not sorry, then don’t re-engage. They have told you through their behavior that they are NOT your friend! Listen to that.