If I don't see her taking steps back towards romantic relationship I will move out and move on
I get it. The "time to make your move" tho, seems like much more of an ART than a SCIENCE. Each sitch is slightly different, so there is no definitive 'time' to do it, it's all relative. I think you'd be right in setting a date, 4-weeks, 8-weeks, etc, and say, "I'm moving back in the master br in x days..."
OH, better yet, since you're perceived as the controller, make her think she's the one making the decision. phrased more like, "I've been staying in the spare BR for a while now, and I feel like I'm really dedicated to making changes XYZ. What would it take, for you to consider my moving back into the Master BR? You don't have to respond right now, but just think about it and get back with me. okay?"
Then it puts the ball in her court. and you can set a 'mental timeline' for you to ask her again in however many days/weeks you deem necessary.
