How to end things that wasn’t really even a thing to begin with 🤦🏻‍♀️

So I’m talking to this guy and it’s been a few months and I’m just not into it and haven’t been and I thought he’d pick up on the obvious hints like leaving him on read and not making conversation at allll. The fucker won’t stop hitting me up though it’s like annoying asf. He asked if I wanted to be in a threesome and I said lemme think about it and he said if you don’t want to its fine I’ll just fuck one at a time. That threw me tf off like ew gross. Turned me off so fast and I feel low key disrespected like I’m a hoe but not that kinda of hoe. So I guess my question is how to tell him in not into this like period without sounding like some bitch or like I’m butthurt he’s talking to another girl. Cause I’m not he’s allowed to, I just don’t like him or the way he talked to me 😂 I just don’t wanna come across a type of way ya know.