A younger guy won’t leave me alone after rejecting him many times.

Hi. I’m using my second Reddit account because I have a main one but I had to use this one to post because a younger guy from Reddit keeps messaging me and I need advice.

I (37F) post on many different subs on Reddit. One time this guy (22M) started sending me DM’s. Apparently he saw some pictures I had on my main account and he became obsessed. I’m fairly normal but people have told me I’m photogenic. I’m starting to worry because this guy follows all my posts. If I write something he’ll DM me telling me what he thinks about what I wrote. It always happens. I have told him I don’t want to talk to any men for now as I’m healing from a breakup. Plus the guy lives in another country and I would never do another long distance relationship based on my personal experience.

He still DM’s me even if I told him like 10 times that I don’t want to lead him on or give him false hopes. I even stop responding to him to see if he’ll get the message but he won’t give up. I don’t know what to do. I know I could just block him but I feel kind of bad. He doesn’t seem like a bad guy and I don’t like being rude but I’m just not interested. Is that hard to understand? What can I do to make him stop following me?