Sounds like you are doing great, Val. It is indeed a very tough road but one that gets easier the more that you travel upon it.
Personally, I would un-friend your W from FB. I understand your concerns that it is scary, and only you will know when it's time to do it, but it's one less way for your W to hold sway over your emotions.
I haven't visited my W's FB page in over three months, and it's been one of the best decisions that I've made. I don't think my heart could take what I might find there. It's made it so much easier to move forward in the long run.