Am I a bum for quitting!?

I'm a junior in high school and I've played basketball since 3rd grade. I played freshman and sopre year but I got cut this year. (everyone said I should have made it btw ) and I was pretty mad. I am now playing for a spring AAU team that I played on last year too, and all the girls on there played this past year in high school, so I feel like the worst one. I think after this team, I'll be done with basketball forever, and I was just talking to my sister who is a senior and REALLY good at dance (she just made one of the best college dance teams in the US) and we were talking and I said "I can't wait until basketball is over" and she's like "whyy you're gonna be a bum" and she keeps trying to get me to try out for the high school team again. I mean I don't really want to. I'm sort of over basketball... but now I feel like a bum. I hate that.. how she said I am a bum juts because I don't play sports. Am I?