Hello Ohgosh, It has taken me months to realize that the BS is not about me. The hurtful things said during the first 3 months after BD shocked me and at first I alternated between being devastated and believing them, to arguing in my defense, to just flat out lying on the floor of my bedroom closet sobbing my heart out from the hurt of it all. But as time passes you will come to realize that some of the words have some truth to them, and some of the words are just crazy talk, and ALL of them have more to do with what is going on inside of your W's head than about you.
That is where detachment comes in. Which has been the hardest part for me. It sounds like you are making some positive choices with keeping yourself busy. Stay busy, work on yourself, don't take things personally. Keep posting, we get it.