Does this guy still hopes I might get interested in him? Guys can you give advice on how to make him understand I never will?

I met him almost a year ago at a friend’s party. After a few drinks he started hitting aggressively on me, I was very annoyed. He even complained that I didn’t seem interested an I had spent more time talking to another guy. After the party he started sending me messages on ig daily. I never answered if not once, as he asked me to go for a drink and I said I was going on holiday for a month. I hoped he had gotten it but he kept sending messages (never answered) and a month later he asked me to go for a drink again. At that point I told him very clearly that I wasn’t interested in dating him and I didn’t think going for a drink was a good idea, as he didn’t seem to want to be just friends. He denied everything and never wrote again. Until today. He wrote again and started putting likes on my Instagram pictures. I have never given this guy a single sign I might reciprocate him, I told him the opposite. I am not sure what I am supposed to do more than this to make him understand.
Does this guy still hopes I might get interested in him? Guys can you give advice on how to make him understand I never will?
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