i think that if she hadnt said that its best not to speak, low contact would be a good way to go. it keeps you on her radar, but stays out of the relationship, lets it stand or fall on its own.
since she was the one to set the terms, it shows respect to heed them, and that looks good for you. plus, i wouldnt worry too much about staying on her radar, she hasnt forgotten about you.
Honestly when I think sending her a text my anxiety goes through the roof. Mostly because I'm afraid of it going badly and getting hurt more.
this is another good reason to maybe set it aside for now. if the time comes to say something, youll know it, and youll know what to say.
dont just let her do her thing. you do yours. get back to the confident, upbeat guy she fell for in the first place. dig into the lessons and tools here. develop a very different plan for the relationship, if she does come back. and build your life up. it will look attractive, and youll feel a lot better.