ExerciseFanatika First of all, Welcome fellow NYer.
I am so sorry to hear about all of your losses. I know it can be very hard.
I am very concerned for you. I think the reason you are depressed and not losing weight is starvation. Please read Primal 101 on the blog or the "Start Here" thread on the forum. I think that you will feel better once you begin to give your body the nutrition it needs.