I want to kiss a girl with a boyfriend.
Why do you want to kiss someone who has a boyfriend?
I wanna flirt with her and show her how it feels to kiss someone else other than her boyfriend.
It isn't right to try to kiss someone who has a boyfriend, and try to get her to cheat. You could ruin their relationship by doing that. I think you should look for someone who is single instead.
Thanks, but I'm not ashamed. I'm going to kiss her.
Sometimes you cannot help who you are attracted to but you should stay away from a person that is in a relationship. She might really regret kissing you if it harms her relationship, and I'm sure her boyfriend would not be happy with you if he were to find out.