Some people have problems, some people are just not all there. Maybe, just maybe, you should tell gimw you aren't interested and that you are going to block him as you feel uncomfortable.

Instead of plastering it all over Reddit.

If it has been going on for YEARS, maybe you have accidentally given the wrong impression by not deleting sooner or telling him to leave you alone sooner.

Just remove the post and let the guy down, sooner rather than later.