I dont know what to do

well I ave this neighbor and shes reallly nice and caring. well to me shes like my older sister and ill admit she does get drunk and she does drink. shes lived by me for about 2-3 years and shes only gotten drunk about 3times at the most…my other neighbor doesnt like her and never will well hes reallly close to my parents and they believe all the things that he tells them like she gets drunk every day and her and her boyfriend do things innapropriate around little kids and a bunch of other things that my parents beelieve that isnt true…she loves the way that I sing and is always talking to me about it(I have to talk to her behind my parents back because they dont want me to be around her) and well she says things like do you want to become and ainger and things about my singing. her boyfriend is planning on proposing to her and she said at their wedding if I sing my dream might come true because her brother is a producer…singing means the world to me but my parents wont let me do it and they know I love it. I have no clue what do to because I’ve wanted to be a singer ever since I was 3…should I go behind my parents back and sing there since they will be having it on property accross from my house or shouldnt I…please I dont know whhat to do and I need advice