Im trying 2 convince my parents to let me take spanish although i already know spanish?

well i dont know complete spanish bcuz i moved 2 usa wen i was 6 n i started tlakin wen i was 3.......i get straight As n i nvr fail any cl....i wunna take spanish cl bcuz lots of my friends r there that i havent seen in like 3 years....plz help me rly important