Pizza I'm not sure if I'm on the totally wrong track here but you mention your faith. Maybe it's against your spiritual beliefs to get divorced?
if this is the case can you talk to someone in your church/worship place? An "elder" or some one in the community who has faced similar challenges?
Leaving a relationship isn't always as simple as leaving the relationship if that involves breaking spiritual or community codes.
I'm glad you posted. We are here for you.