@redsun9175 no wonder you have PTSD!
You really did give him your all. Your best years and your loyalty and love.
You are now waiting for your relationship to implode again and deep down, you know it will.
He has a roving eye and although he changed his mind about leaving before (it would cost him a pretty penny to do so!) you know that he will one day soon and it will devastate you again.
When we deeply love someone, we don't look to other people for sexual and emotional connection. You know that because the thought of cheating on him repulses you.
He doesn't feel the same way. He isn't in love with you anymore. He is used to you, cares about you a bit (but not enough to not destroy you) and likes his home comforts but this isn't love anymore.
In your shoes, it would be helpful to unpack all of this with a therapist on your own so you can heal and find your way to leaving him before he dumps you again.
See a solicitor to find out your rights and what your share of the finances would be (his pension etc).
Then sit him down and tell him that you are done. You can love him but not want to be with him as his 'home comfort' until the next woman catches his eye.
You can move on with the rest of your life and maybe one day find someone who will just adore you the way you deserve.
Please think about this because the End is coming. Rather be on your terms than his.