While I am a lawyer, I don't practice family law and I certainly have not practiced international divorce issues, but my guess is that it is harder than I made it sound and easier than you think it is going to be.
When we look for people to save, it is because we are codependent or think we are not worthy of whole people. Some counseling may help with some of those issues.
Your family is certainly a blessing. I am not so lucky.
I too have reached the point of not wanting this person in my life. If I were not getting good monetary support every month (which my lawyer is concerned a filing might affect), I would definitely be filing.
The first step in any of this is figuring out what you want. Sounds like you are beginning that process.
I hope that the path becomes more clear for you as you move forward.