Im goin in2 hs next year!!! u have 2 help me!!?

im goin in2 hs next year and im very nervous cuz im scared no guys r gonna like me and no 1s gonna ask me 2 sit with them at lunch and no 1 will like me as a friend and i might not hav good grades and just everythin!! Can u tell me what i should do and what it will b like when i do go in2 hs next year???? And long answers r very much welcome!