I feel so useless...what do I do?

You are crazy for thinking you are worthless, you are doing brilliantly. You are only a freshman and you shouldn't be worrying about college right now. You are doing great now, concentrate on extracurriculars and gettting your GPA as high as possible. I suggest you start thinking about SAT's and such towards the middle of your sopre year. Relax and enjoy your high school years. It'll be gone before you know it...