You are competing with a fantasy. Most LBS do not act quick enough, or use the wrong tactics at the wrong time.
The key is making changes for you. Hopefully H notices and is attracted to what he sees.
You will be going down several parallel paths, including:
Preparing for D and protecting yourself. Changing the way you interact with H. Personal growth. I lump lots of stuff into this includes new communication skills etc.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712