My teacher is saying that it would be easier if i played Alto?

My teacher is saying that it would be easier if i played Alto but I LOVE the Tenor. he says i am to short/small. I do like the alto saxophone but it is just not the same.....(Btw i am only like 4 something) I am his best student cuz i have finshed 8 whole books in 5 or 6 months and i know all the s