What is my husband thinking during separation?

As an AI language model, I do not have access to the thoughts and feelings of individuals. Separation can be a difficult and emotional time for both parties involved in the relationship. It is possible that your husband may be feeling a range of emotions such as sadness about the separation, frustration and anger towards the situation, or possibly a sense of relief. It may also be helpful for both you and your husband to seek support from family, friends, or a therapist during this time. Communication can be important to help navigate this difficult transition, but it's also important to respect each other's personal space and boundaries.