I did the final letter. Several times. On occasion, I still write him an email, only I email it to myself. It has been a while since I did that, but I find it helps to tell him what a d!ck he is.
It does help to write it all out. I did a h/w letter after we had not spoken for six months. It's still ongoing.
Don't try to force yourself to feel something you don't. It is good to grieve and deal with all the emotions that come along with this, but acceptance takes a long time. It is the longest, and from what I understand, most painful step. I know that it hurts, trust me, and although I am a little ahead of you, I have to admit that there is a small part of me that still hopes that the SG will come to his senses.
((((BIG HUG NIK)))
Im still standin better than I ever did looking like a true survivor feeling like a little kid Im still standin after all this time and Im picking up the pieces of my life without you on my mind..