If he starts missing you, it will create problems in their relationship.
As long as he knows you are waiting, you WILL push them closer together.
Disappear. And disappear for however long it takes, you can't disappear and re-appear (he'll know you're acting). It's super scary but it's the ONLY way.
Your emotions are lying to you. I go through the SAME EXACT thought process you just mentioned. I'm scared that because I'm NC with WAW, she's moving on.
I'm starting to see some small positive signs. And she even admitted she is struggling. It took me 30 days of NC to get that from her.
