AutisticKid crushing on me

Why do people not get the hint that i dont like them. This creep, lets call him Nat, Likes me and has been following me around or just trying to be touchy and im trying so hard not to snap at him cause his ass is Autistic, Loud, Unfunny, Rude, Suicidal little freak. Hes a grade younger than me and he has told me once that dating me wouldn't be so bad after legit telling me how he wondered what holding or kissing a girl felt like and then asking me if i done stuff like that. he's also been trying to lean on my shoulder and even asked to lay on my lap but i firmly said no. He acts like his life is the worst but his ass literally gets a free pass on everything and always compares when someone else is suffering yk? He even said that me not taking off my piercings, since they're lip piercings, reminded him of a video about 'when the huzz sucks you off but has piercings on' and i was so freaking weirded out and immediately cringed out. Cant he go float himself like i have nothing against Autistic or Suicidal people, im LITERALLY just hating on his creepy ass okok XOXO