Here is the key phrase from your post asking if withdrawal or did he make up his mind to go.
Quote:
I began to think back to the phone calls he made to me and I realized they were only when he wanted to have sex with me.
You realized it. That is the good part. Men have a funny habit of going back to the last place they had sex. We know how to do this. I saw an ex-GF of mine almost 20 years after I left her for my ex. All I had to do was snap my fingers and I could have had sex. I didn't but I knew where to go if I wanted to.
Let's face it. You can read all you want. All it does is spin you in circles trying to figure out where he is. I read that MLC can take 3-10 years if indeed it is MLC. You have two choices. You can try and figure out where he is (I have seen people stay mired in a funk for the rest of their lives - you know 30, 40 years). Or you can live your life.
Again, it is good that you realize he was coming for the sex. That is the important thing. Move forward in your life. Life is too short to figure out where someone is.