You wouldn't be "normal" if you didn't have those moments. Allow yourself to mourn the death of your marriage and way of life. Cry it out, think about him, for a bit, then call a friend, your therapist, journal, take a walk, go out for coffee... The point is, confront the pain, then respond to it accordingly. It does suck, it will get better, but it's a marathon, not a sprint. One baby step at a time.

Try reading a good book on the topic. I found the book: 'Divorce Sucks,' by Mary Jo Eustace a hoot during a very difficult time. Her husband left her for Tori Spelling.

I may reread it myself. Am hating my own new way of life these days: broke and no desire for any of these very nice men I've been casually dating.