You must file for divorce, and I strongly recommend that you use an experienced, matrimonial attorney in your jurisdiction
Who is familiar with the local rules and exactly what has to be done.
It is a matter that is too important to leave to “self help”.
If you are living in the NYC metro area, please call me at 212-370-1660
to arrange for a meeting to discuss the matter in greater length.
Leonard Weiner, Esq/Divorce Solutions