How do I tell my parents i want to quit basketball?

Ive been playing bball since i was 5 an i loved it. Then in 6th grade i joined a travel team and i started hating bball and it made my life miserable. We had a tournament each week in a different part of the state i live in and we had practice 3 days a week for a total of 7 and 1/2 hours a week. I wanted to quite and went through a lot of drama with my parents and finally decided to play. I did it again in 7th and quite the team and went to a new one. Although this team is less of a comitment i dont want to play on it and i dislike the coach. She is my middle school coach though and i fearif i quit this team shell either not put me on the ms team or hate me and not play me. I still have a good relationship with my old coach but i dont want to go back to him. I cry every night before practice and my parents make up excuses like excersices just in a gym every night is not going to be enough for keeping you thin and in shape and also that the girls on my team will hate me and i won't have any friends. I don't beleive any of these and it makes me feel like there making up excuses. When ever i try to tell them how i feel they say i need to give one more year of travel if i want to playhs bball but i dont want to! I'm so sick of bball and this stupid travel caused me to dislike it. I'm just okay at it but i really love it and i give 100% each practice. But i think ill be happier if i dont play. how can i tell my parents that i dont want to play and convince them. I'm not going to keep doing something thats not keeping me happy.