If I am dating a woman and she backed off I would not chase her assuming I had not backed off. If I backed off and she didn’t I would assume she eventually would and then it would be up to me to reach out and initiate things.
M knows he has changed, is busy, or whatever he has going on. If you respect yourself back off and don’t chase him. Show him your value don’t come across as desperate and needy. No different than we tell the LBS.