Advice on ending no contact

Hey everyone, I am thinking about ending no contact with my ex girlfriend in about a week or two. I don’t know which way to go if I should write a letter to her or doing the “false friendship ” talked about in Relationship Rewind. If I do the letter I was thinking on doing something that includes both things in the “Magic Letter” talked about in Relationship Rewind and what Kevin suggest to write. Would that be a good idea? I guess I would put some of the “Magic Letter” because I feel she is starting to move on and I feel like she might not be the same person anymore. I guess I kind of hope that approach will win her over and hope to see results quicker. I also would do the “false friendship” but not sure if I would be able to keep it up. Any advice please? Or send the letter then the “false friendship”? I guess to be honest I’m starting to feel kind of desperate and feel like she is moving on she got a gym membership and looks much different on her Facebook pictures. Am I being too hasty or should I do something else. I’m not sure if I’m doing the right thing. Please help me out.