Typical behavior for someone caught up in the heady emotions of a romantic relationship in its earlier phases. Huge endorphine overload, lots of adrenaline -- it creates obsessive, addictive behaviors.
Remember the over-the-top sensations you get with the "in love" feeling? This is it -- and this is what it looks like to outside observers. It appears insane to us, but to them, they see absolutely no downside.
The technical term is, I believe, called "Limmerance".
Couple that with a possible MLC, and your spouse is tripping on all sorts of abnormal, though naturally occurring, brain chemicals.
Short answer: Yes, it is a form of addiction.
I am sorry. I wish we all did not have to meet under such mutual, troubling circumstances.
Mark is very right. It is best to let it go and focus on yourself and your family. You cannot control what your spouse thinks or does. So work on making yourself happy. This is the best advice anyone can give you regarding this.
