Why am I the only single one out of all my friends?

I'm 16 years old, never had a boyfriend, never kissed a guy, never even held hands with a guy. Everybody says im gorgeous, pretty, etc. I mean it never really bothered me until now when everyone is all lovey dovey with their boyfriend/girlfriends in front of me. I seriously decided to be by myself & study at school then be with my friends. I don't wanna be around them while they're kissing and hugging on their partners. It makes me feel left out. I'm not trying to say I want a boyfriend just because everyone else has one, I just wonder why no guys have approached me or anything. Is there something wrong with me?