There is not a thing wrong with you. One year antiversaries are tough. I thought, surely in a year, this will mostly be behind me. The pain, the anger, the sorrow, the rage...but it isn't and it is so depressing that it isn't. The general wisdom on this site is that it takes three to five years to really feel better and I believe it.
We are coming up to our third antiversary and it is FINALLY much, much, better.
As long as your FWS is doing all that he can, you are talking, working together, then it will get better. Don't be afraid to tell him you are having a bad time and try and explain why.
Hopefully you have been reading the healing library articles and have some good books to help you get through some of the rough times. Hugs. Hang in there. It DOES get better.