<human>: Can you succinctly summarize the text in 1-3 sentences?

Listen man, I'm gonna come off as a douche. I apologize ahead of time for coming off as rude.

For the past year, this (We don't know if he has autism, but he shows a lot of signs) autistic guy has been following me and my friend's group around a lot. I made a big mistake by being very kind to him, because now he thinks we're friends. We are not. I am very uncomfortable whenever he says anything because he is just OOZING with autism. Like, I'll be trying to have a conversation with someone and he'll whip out some meme jokes, make a weird spit sloshing sound, talk about mine-craft, and walk away. Now I don't really care what people think've me, but It's gotten to the point where my own friends will avoid me because this guy won't leave me alone. Not to mention he reeks of spoiled movie theater butter. Whenever he talks everyone just gets really quiet and says "Yeah, uh-huh, okay." He does not get any social Queues what so ever. 

How do I tell him in a nice way to kindly fack-uff?

I don't want to hurt his feelings but I'm tired of suffering. I dread meets because he's always there and he's ruining everyone's time.

Help, please.
<bot>: Autistic Kid won't leave me alone and I don't want to be mean but that's backfired and now he won't leave me and my friends alone.