Sorry you've been through this and are still smarting from it. Like yiu say, keep reminding yourself of the reality of the situation and don't give those fantasies headspace.
Have you read the CoDa handbook or attended any of their meetings at all? If not it could be well worth a look. (Especially the handbook - I read it with tears running down my cheeks as so much fell into place for me as I saw myself and my experiences in its pages).
Prayers for you today.
BB