I know that I've told you this before...but just get it over with. The anxiety is coming from not dealing with it. The anticipation of what you think might happen is worse than just doing it. You don't have to be rushed and you can stipulate that he is not to be there. If you get some legal advise first, they can help you with how to do this. The longer this drags on the less power you have over it. At some point, you will loose your rights to whatever you left there. Talk to a lawyer and just do it.
Forgiveness is a tricky thing. You would think it's about the other person but it's really not. It's about you. Once you can truthfully say, I forgive you and mean it, it's so freeing. This is what I did. I wrote down all the things that I needed to forgive when I split with my ex. Then, one by one, I burned the papers in the fireplace. You could do it on a grill if you don't have a fireplace. It sounds corny but it gave me a real sense of letting go.