My mom is not supportive of me dancing, what should i do?

My mom isnt supportive of me dancing, writting,acting or anything else that is not swimming. She is very, EXTREMELY supportive of me swimming even though I haven't been doing that great(been in a slump). Every time I bring up an awrd that i won in school for writting, acting, passed the talent show auditions or entered a new school organization she reacts very dull, or changes the subject to swimming, which i am only staying because i have great friends in the team. Recently i got invited to be part of a dance team, and there planning to go dance in Malaysa and other big stuff and also i been aproched by other dance directors to be part of workshops and stuff, and my mom hates the idea because it isnt swim related...I try to reason and reach an agreement but she just doesnt what to budge. she makes me feel worthless by comparing me to my best friend who is a way better swimmer than me, she constantly does this!!Its horrible i feel like she doesnt want me as a son.:(