personally I don't think filing for divorce will help you detach, in fact if anything, the opposite intention will be achieved.
Let him deal with this situation, let him file and let your lawyer take care of it when he does.
Until then, just live your life without him, go out with friends, maybe starting dating again, just get out there and really detach from this situation.
FWIW, I don't think you should accept any legal advice on these forums, every location is different with regards to protocols in place plus a lot of legal advice could be wrong. Just my 0.02 cents.
