As i have said in a previous PM, you are more then welcome to message me any time you want..
Are you guys living together right now? Maybe some time apart from him will help you decide what you want. Is there someone he can go and stay with for a month or two? It might make it a bit clearer as to how you feel (will you miss him or not even notice he isnt there)
Are the things that he wont change and you want him to cruicial to the relationship? (ie, is it about health or safety etc?)
Do you have family near you for support?
Will message you later when i have a bit more time