Pull out the ole sick card. Start out gradual, i.e. migraine headaches, joint pain or play the extremely busy card, ie. long work hours or traveling.
It will be more difficult since your family all attends the same hall. It may take some time and patience on your part.
This will begin you distancing yourself but once you decide to completely fade they will try and love bomb you back in.
They have tried love bombing us and we give them NOTHING. I owe them NOTHING.
Keep us posted.