No means no.

I get that you were being playful and messing around, but after me repeatedly telling you no for two days straight I think you would get the hint. It scares the fucking shit out of me when I say no and you keep touching me.

I'm not the most assertive person. I let you have your way because you are twice my size and way stronger than me. And you know what? I regret that. I told you no, and you didn't listen. Yeah, I gave in, but that doesn't mean yes. I just can't fight anymore.

And then this. Two days of you being clingy. I needed space. I was in a new space with new people. It freaked me out when you would touch me and I would push you away and you would keep doing it. I was under a ton of pressure. 200 new people in one room. That's a lot of stress. Trying to keep up with a conversation and pushing my nerves back was hard enough without your hands on me constantly. I get you "like being clingy" but that isn't something I'm "just going to have to deal with." I'm standing up for myself. I will not let you touch me if I say no. If you keep this shit up, I'm leaving, and you won't ever see me again.