How to get over this? How should I feel about it?

Today i was at the park and my friend dared this guy who liked me to give me a peck on the lips. He did it but I don't like him back. I don't feel the way he feels about me with him. He kinda creeps me out because he flirts alot with me and acts as if he's my boyfriend. Even though I got my first kiss , I'm still creeped out by it. Like I always wanted a first kiss with some hot guy (lmao) but not with a guy like him. I feel so weird about it. I feel like i kissed a 40 year old man. And I feel guilty about it because this other guy that likes me hates him and I just got kissed by him. But I didnt want to kiss him. Ever. I wanted to kiss a hot guy. Now I feel just so weird and I'm like wripping my lips 24 /7 to get the feeling to go away. I just want to get over this and like never kiss him again. But like how can I get over this? How can I stop thinking about it? How should I feel about the kiss?