Kathy and Jim,
There is no time limit on grieving; don't ever tell yourself that by now you should feel 'better' or 'be over it.'
Now is the time when you should be the most gentle with yourselves, and I am not telling you something you don't already know. All of us forum-folk care about you and your family. Would it do any good to visit Brian's grave? I hope you get a good night's sleep.