I feel so gross! I inappropriately touched a few of my friends and I feel absolutely disgusted with myself
I can't believe you would do that! Why would you do something like that?
One of my friends did something to me that I did not appreciate, so I did the same to him back.
Two wrongs do not make a right. Don't cross someone's boundaries just to get even.
I feel absolutely horrible for touching my friends but I want to prove that he was disgusting and hurt me.
Well it sounds like you'll never do it again, which is really great to hear. You're right that he was wrong to touch you in a way that made you uncomfortable. Next time be stern and just tell him instead of demonstrating.