Lonely is just another word for not having met your match.
Since you are in high school, that's probably a good thing
Let not your heart be troubled - trust me when I tell you that it is a good sign that high school is not the best time of your life.
That'll mean more retrospectively than it means prospectively. But, I think you already understand that. Take comfort in your future - and it won't be because you make more $ than the people around you - it really means that you finally decide to recognize that who you ARE is really pretty cool. And THAT is the biggest victory of them all.
Accept yourself - even if the people around you don't. A change of scenery works wonders!!