I need advice on how to move on.

[TinCow]

I am getting ready to do the nuclear option and cut off all communication from her. It's going to blindside her for sure. We have been such great friends for so long. But I have gone from literally melting down in agony for 6 hours at a time, not sleeping/eating at all for the next day, to being more social in my life and dealing with strong but temporary anxiety attacks at night. However, I every time I even see a tweet or see a post on facebook, it just stirs the pot. And I get into a tailspin quickly. She expects to meet up on Sunday to watch the film she has been working on for so long with the rest of her classmates and friends. But I am planning on spending my saturday with family and I am going to drop off a letter at her house on my way up explaining why I need to cut myself off from her, at least for the near future. I will say a few other things on my mind which I feel are important and then when I get home I am pulling the trigger.

I think that's a good idea. You need to move on, and you're not going to do that when she's regularly in your face. It's theoretically possible to remain friends with an ex, but it's very difficult and it rarely works out well. I don't think this case has much hope to be that exception. She might be perfectly happy to have you around as a friend, but you would be tortured by her presence and her social interactions with other men. Cut the cord and move on, it'll be much easier for you that way.