DEAR HARRIETTE: I have not dated in a year, and due to lack of closure, I cannot stop thinking about my ex. I have not thought about him as frequently as I did when we first ended things, but now that I have become sort of a recluse and do not go out very much, I have been daydreaming about it more. I know I need to get out of the house. Last year, I would go out every weekend and meet new people,…