I don't want to be seen as an easy girl, help?

I drank too much and hooked up with a guy I wasn't into. I made a mistake. The guy was kinda creepy; not someone I'm proud to say I got with (we didnt have sex). A good amount of people found out including my crush. I feel like if I kept this up, I could become a slut and I don't want to be like that. Inside I know I'm a special person but peer pressure causes me to not be my true self and act like the other girls (slutty) instead. I feel pretty worthless atm. I also don't want my crush to think of me as a slut anymore. I messed up. How can I stop acting out like this? And how can I redeem myself in front of him and all those people?