Good for you YF!!
Life is too short to be wasted on those that do not care about us. I hope 2018 is a good year for you and that you will go out and do the things that you want, things that will bring you joy.
Your son, my son and all the adult difficult son's and daughters out there will continue to live their lives on their terms and may we as parents will stand firm and strong in our resolve to let them even when they beg us for help.
Here's to 2018 - "The Year Of Detaching"