years.
please try to find time for you; to clarify your thoughts and feelings by writing, talking to a trusted friend or family member and perhaps seeing a therapist.
what's really going on with your husband? does he discuss in detail his sudden change?
can the two of you still talk? do you want the same things?
before you go to couples counseling, i suggest that you get some support first to feel grounded within yourself and your life. make sure you are ready to hear what might come out of counseling. 