Have you read the books Divorce Remedy and Divorce Busting? There's some really useful information in there that could help you.
Sounds to me like you need to set some boundaries. Boundaries make for a healthier marriage. There's a thread around here dedicated to exactly that. Let me find it and post it here.
Meanwhile, my advice is to read other people's threads, and espcially the advice of Puppy, Gucci Loafer, Sandi2, Greek and Coach, amongst others... You will learn a lot about how to look after yourself and develop self respect.
Hopefully others, more experienced than me will also chime in..
but to get replies you need to provide as much info about your current marriage problems and what brought you here to get good help.