1. Fear it will go back the way it was. This may also be fear that he hasn't changed enough. (He asked me the other day if I thought he was doing 'better'. I think he's doing awesome!)
2. Fear I will stay grumpy/will hold it against him forever. (They are all afraid of this one. That's why consistency is important.)
3. Parts of his "new" social life are cozy, and he doesn't want to give them up. I don't think it's necessarily because he's heavily emotionally involved...at least, not moreso than with me...just isn't sure if it's worth the change at this point. (What would he gain? What would he lose?)
4. Things I've said when really, really hurt that I thought I meant at the time. lol Usually along the lines of "I wouldn't date you again because of xyz." (We've both agreed that he needs to go sloooow at first in any new R he starts, with whomever, to help identify his triggers.)