What are we supposed to do with the desires for friendship?

I have read somewhere, I don't remember if it is here, that that is often an intermediary step before resuming the R. However, it also seems like it can be cake-eating from someone who has no desire to continue the R, but still wants the companionship.

Any experts who want to chime in?

W 34 Me 42
Married 7 years together 8
0 kids 1 beloved dog
BD 4/6/2018
I moved out 4/7/2018
I moved back in alone 8/05/2018
I file 3/06/2019
D official 5/7/2019