I have high school problems..what should I do?

[Grace]

Everything has been going wrong for me this year. Its my junior year and normally I'm a very good student! This semester I got mostly B's and 1 C (because of an honor class)..I guess pressure and stress resulted from that! All my other grades were mostly straight A's..but this is my junior year and I feel I messed it up! I still have second semester and currently I have mostly A's right now! (Im happy about that). Also today some person was correcting my paper and they said my answer out loud and everyone laughed at it! I felt embarassed so I laughed along...I just felt hurt when they did that! I feel like Im really dumb and theres so much stress I have right now due to college applications! I feel also that most of my friends dont really care about my problems that much..they just care about their own. Why are people like that though? I dont understand....when someone has a problem..I actually listen and try to make them feel better and help them solve their problem..but no one does that to me! They are so selfish..and it disgusts me. I dont know if you ever had this during high school but I feel lost. Im depressed, stressed, have self confidence issues too. I feel that I ruined my chances of going into a good college even though Im a really good student..just this year has been HELL for me. I HATE junior year! What should I do? (Of course Im obviously going to stay in school because education is very important to me and my family..without it..we are all doomed in my opinion)