I'm really sad to hear what you've decided. Please reconsider. I don't want to sound preachy, but I must speak the truth. God is not at the center of a decision to go against His will. He put the two of you together, and only He can take the two of you apart. I know that what you are going through is very difficult, but it is not something that our Heavenly Father cannot relate to. Jesus sacrificed for us to the point of a humiliated death on the cross; you nor I have ever gone to that point, yet we are called to take up our cross just as Jesus did. Please pray about this and seek God's word for encouragement. I hope you will be convicted not to file for divorce.
I have and will continue to pray for you. Please don't think I think this is easy, becaus I know it is not. But nothing worth having is easy to get.