I remember being there and having the same difficulty modulating how I reacted. I think once you start developing your life more it will be easier because you won't be thinking as much about him or relying on him for emotional stuff (i.e. he seems more interested and that makes you feel happier).

You need to get to that place where his behavior, emotions, words, etc... don't effect you. One thing I learned to do doing my divorce was try to look GREAT every day. I also tried to learn to live life like my marriage was over. I had to learn to really internalize that. What it meant, who would I be? How would I want to live my life? What made ME happy (without him). That didn't mean I didn't have the "door open" to my marriage or planned to go crazy dating or meeting guys (well, did meet guys, but didn't "date" or spend individual time with any, and told the ones interested that I wouldn't date until the divorce was final... and I felt mentally ready...).

Although, one thing I must warn you... when you detach as much as I did (I HAD too because my husband was trying to hurry the divorce through), sometimes it's hard to reattach. But you don't need to worry about that right now. This thought pattern and behavior, detaching, working on self, life, positive mental state, etc.. are things I wish I would have done prior to the divorce. Back when my husband started in MLC and was yo-yoing back and forth on whether he wanted to be married. In other words, even if you are not yet in divorce adopting this thought and behavior is personally helpful.

Also, try to look for bits of humor in unexpected places and learn to laugh about the insanity in it. That helps too...

There is no arriving, ever. It is all a continual becoming.