You absolutely need to let go of your old R/M. No question about that. It is finished. Your W is done. You have accepted this at least you have posted that you realise this and accept it. Yet you haven't. We have told you. She has told you.EEven you have told you.
The only way to attract her back is to become attractive. Work towards that.
If living together prevents you from improving yourself., then you may have to choose not living together. That is just a step for you. Not an end to a M that has already ended.it could even be the first step to a new beginning.
Buy no one is telling you walk out on W and don't look back. Though Txhubby and others could vouch for the merits of that to save your M. Others will testify it will save you.
I say it is possible to do a lot more work on you without separating houses.
You are blocking you. Start living again
Best wishes
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together