May, Valeska, Steve, R2C - Thank you all for the advice and support. I've made the final decision that I cannot emotionally handle an in-house separation. I bought my plane ticket this morning. I am leaving on Nov 7th and going to stay at my families home. I think I am going to give myself 3 months to emotionally decompress. I'll then have to decide which direction I want to go in. I will need to decide where I want to live, will need a new job to fully support myself, essentially I will be starting from scratch.
I think the final thread that was keeping me attached to my W snapped yesterday. We got into another argument. She started screaming at me over a meal I bought her for lunch. I realize she wasn't angry over the meal but about our entire situation. We are both incredibly hurt and angry with one another. I am angry because she refuses to acknowledge that her relationship with the OW is wrong. She continues to claim it is just a "friendship". And she is angry with me because I will not let it go and keep accusing her and throwing "daggers".
We both agree that it would be best to do the full physical separation. I have no idea where it will lead or where we will go from here. I just want to get away from her and figure out a way to begin healing.