I kissed a boy while drunk

I kissed by a boy at a club when I was blackout drunk. I do not know his name, age or even what does he look like. The issue is that I kissed that boy back.

I am 21 year old college student. I did not kiss anybody before. I hadn't got any boyfriend or girlfriend. I did not even flirt with anybody because I am not comfortable with all these stuff. The casual hook up culture, one night stands, flirting with multiple people at the same time... These are not familiar to me. I dont like them. I always wanted to live those things with someone I love. But now my first kiss is gone and I do not remember it. Its okay. Firsts are overrated but the issue is drunk me kissed him back. I kissed him. I cannot believe myself. I am angry to myself. I dont remember if I enjoy it or not but how can I did this? I was with my friends at that night. They were like "Good job champ" They didnt stop me because they thought I am enjoying it and I dont know if I can ever be able to trust anybody. They seem to take this as something normal and I cant stand it. It was suppised to be a rape. How can a drunk person give consent? And I am awful. I cant think about anything else. I am trying to look normal. Trying to move on. But... If I hadnt kiss him back I wouldnt be upset because then it would be rape but now... I am angry to myself. I feel disgusting and angry to myself.