Just as a drug addict can "quit" for a while, when they aren't working a program and attending meetings and concentrating on themselves, they usually go back to their drug.
Your situation isn't a whole lot different, you are withdrawing from your own DOC, him. If you can find things to do that take up so much of your time and your thoughts, then there will not be room in your mind to dwell on him, what he may or may not be doing. Everything will be concentrated on you. Then one day you will realize, out of the blue, wow, I haven't even thought about him for a while.
Sending Hugs and Prayers
B