32 weeks pregnant and getting divorced

HI I'm 32 weeks pregnant and I'm getting a divorce. This is my 4th child and I've decided this marriage isn't going to work. Tell me if I'm in the wrong. My husband wants to party and drink with his friends 5 days out if the week, go to bars, strip clubs, or house party's on the weekends. I have caught him cheating on me twice already since I've been pregnant and he is all the time messaging women on Facebook. Please i know I've got to be doing the right tjing. We been together almost 15 years now. It's time for this to end I can't take it anymore. Please any advice will help!