Hi, How long have you been married to him? Have you been experiencing problems with him since long? Are you both sure this isn't an impulsive decision? These are important questions which need to be answered before taking any drastic steps. I'm guessing you both haven't tried couple counseling. In which case I would strongly recommend you should before taking any such steps as its possible that you both might be highly emotional rather than objective. Visiting a professional and discussing details of your relationship, thoughts and feelings can help you get an objective view and make decisions which either of you won't regret in the coming years. So I urge that you fix an appointment with a counselor first and then think of separation. And talk to your husband for the same if he would be willing to get into a session as well. I hope this helps you out for the time being.