Z-man. I've seen you do swimmingly well with this process in the past and have every confidence that you will again in the future, hopefully the future that starts at this very moment. You are going through a divorce and recovering from such is not an instant proposition. Think of it like this, if you mount a magnetic compass in a vehicle it will be unstable any time you change direction. Once you are on an established course it will be stable and useful. Make a sudden turn or a change in speed and it will not be stable or useful in the slightest.
After a divorce your emotional compass is bouncing all over the place and is not particularly reliable. It may be fine for a while, then bounce again. Your job is to stay in control of your life and realize that your internal emotional compass can be misleading. I do not feel it my place to criticize the relationship you have formed since splitting up with your wife. I'm far too distant from the situation and have far too little information even to form an opinion. In general, I believe that emotional commitment is necessary and I, personally, have turned down sexual opportunities because I didn't feel that emotional commitment was present on the part of both parties. I don't want to simply "get laid", I want sex to be part of a committed relationship between two people that seek to function as a family. I have no idea what the prospects are for your current relationship to function as such.
No matter what, PMO is not a substitute for a real relationship. It never can be. I have learned to face living without sexual release until such time as I have a mate and have made peace with that prospect. It may require some self discipline, but it is not a difficult, near impossible course as some would characterize it. I am always in control of myself, you are always in control of yourself. If I can do this, so can you.
Keep up the fight, Z.