Can't tell you how to drop the rope as I haven't fully yet but each day gets easier. The pain slowly fades away as you carry on with your everyday life. I'm not fully happy, although I'm better than a year ago.
I now really believe that time is a healer. Look after you as you are the most important person right now.
I wish I could be with STBXH and do the thing he does with OW, but I ain't and the only pesto that is hurting is me not HIM or HER. Take the focus of them to you.