SO MAD AND FRUSTRATED!!!! PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLZ HELP ME!!!?

Well my sister hangs out with the brother of the guy who has a crush on me. The brother comes to our house all the time. The brother asked the guy who has a crush on me if he really likes me, and he said yes. I specifically told her I DO NOT and i mean DO NOT like the guy because hes rude. My sister told his brother and i like him and one of my sister's friends who is my favorite asked me questions about my hobbies and my favorite color, food, etc. She finally said in these exact words " You know that ( the guys name ) really really really really likes you. He knows that you really really really like him." She said. I was like, wait wait wait wait wait, you think I like him??!?!??! and i went over to my sister with her and my sister says "( friends name ), you weren't suppose to tell her that!!! and she knew he likes me so i figured out that she said that i like him. i ran upstairs and talked to my mom and she soothed me out of it and to sleep ( it was 11:30 pm ) the next day, she came home with a bunch of other friends including my favorite friend and his brother and he told me " ( the guys name ) doesn't care anymore." and i was like.. " ok then? " and then a few times before i was working on my twirling and dancing outside and i ran upstairs fast enough because he and the guy came and they did that a couple times before and they stay until midnight from 11:00 pm and then my sister came up and asked me to come to the basement because the guy wanted to talk to me and i said " no im too tired i dont want to " and she kept haring me and i was like " NO " and the guy heard me and i stormed upstairs mad and they still think that i like him and they dont understand!!!!!!!!!! my sister hates my guts and she definetly wont understand but ill talk to my mom and hope she'll talk to them and tell them i dont like him and im tired of them haring me. im too young to have a boyfriend and i dont want one! plz no negative comments i need help im stuck and frustrated!!! PLZ HELP ME!!!!!!