Bugging the heck out of ya, huh? Well, since you have a son together it is rather hard to distant yourself, but, you may want to work something out to see if you can limit the times you talk to her or actually lay eyes on her for a while. I know cases where the dad goes to pick up the child and dad sits in the car and waits for the child to get in and the mom never sticks her head out the door. What I'm trying to say is that a few days without contact may be the medicine you need now. It sounds like you may be on the verge of a big "blow-up" from stress building up inside of you. Maybe you should think about it.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!