Separation

I decided I wanted to separate from my husband almost 12 months ago, however I'm finding it difficult to take the next step. We are still living under the same roof, but no longer sleep in the same bed and I have emotionally distanced myself from him. Despite all this I'm having difficulty finding the courage to take the next step. For those who've been in this situation how do you move on? I think I'm just procrastinating and my Psychologist would agree!