Its a phsycological thing that involves chopping off my hair.help?

so i have what people call "really pretty", past my shoulders curly/wavy blonde hair. A lot of ppl say theyre jealous and the thing is when i was little my mom used to make me have stupid above the shoulder length hair with bangs and when i got older i chose i wanted to grow out my bangs and have rly long hair and i always loved it bc i thought it was so pretty. Im 16 now, and i just want to cut it off so bad sorta like a courtney love/brody dalle style. But in a way it's bc i feel like my long hair almost makes me feel vain at times and i hate that and i feel like if i just chop it off i'll lose that idealism thats its so important. My parents only complement me on my hair, and all i hear otherwise is how my sister was a better kid than me, smarter, ect. So in a way its to get back at them too because my hair meant SO much since it was the only thing i got complemented on. So i wanna know if im making a mistake bc i will hate it when i cut it and only hate myself more because i did it for the wrong reasons or will it make me feel more liberated? Somedays i look at it and its my favorite feature bc it always looks so nice and like i spent 3 hourse doing it and other times it makes me resent myself so much.