She seems like she wants to rush all of this right now. She told me she wanted me to think about mediation tommorrow and give me an answer.
So, tomorrow you research mediation and then you tell her that you have looked into it and you will consider it. But....it's not just the two of you in the marriage. You have a child. And your child deserves for the two of you to make every effort to keep the family together for him. So, before you hastily tear apart the family, you think the two of you should go to a Retrouvaille weekend. You are not asking her to do it for you. You are asking her to do it for her son (or daughter). One weekend is not too much to ask for his parents to make the effort to keep the family together.