I acted like a whore

Last week I was at the beach and I knew a guy. He was pretty fun, we talked all the night long, but at the end of it we decided to make out. I don't know what happened to me, I have always believed that kissing random people has nothing to do with your self respect if you don't let them touch you. I have always promessed me that the first guy to touch my vagina will be someone special. I don't know what happened to me but he ended up touching my v and I didn't did anything about it, I just let a guy a I have met the same day to do that, After all the time I had waited before! Now I feel super guilty and sad, it wasn't even great I didn't even get horny and I lost my first touch to a guy that I barely even knew and that I won't see ever again. I feel such a slut and a stupid girl