Why do guys not approach me?

I am a 17 year old female and I have never dated anyone, no one has ever shown romantic feelings towards me. Like most of us, I would really like to experience a teenage love, but it feels hopeless. I don’t know if this is because I’m unattractive or my personality is repelling boys. I would not like to make first moves, but how can I make myself look approachable? Am I the problem? What should I do? Or should I just wait? Will I ever be loved?