Should i Be Able to make my own decisions now...🤫

ALL ANSWERS AND COMMENTS ARE WELCOME

So im 18 and i have a ldr (Long Distance Relationship) with a guy who's 19 he'll be 20 October 14th. I want to move to new york with him and we'll be together 6 months in October. My mom says i cant go even though legally ik i can. He always helps me out when i need it via Chase Quickpay and i trust him 10000000% my mom says i shouldn't do it because idk who this person is but i do. I stay on ft with him 25/8 and always ask her to say hi to him when we are on ft. Anyway long story short i feel like she's holding me back from my true love and life. If i mess up by doing this yes i know the consequences but i have to make my own path and make my own mistakes. She cant dictate my relationships forever. I feel strongly that at this point if she still says no that im just gonna say fuck it and leave and leave them a note because i dont feel like this is fair. She just thinks im gonna fuck up my life like she did and not finish College or get pregnant but im not like that. I know what i want to do and im determined to prove them all wrong and im gonna be with him whether they like it or not. If i have to leave with no one knowing it so be it. I mean whats the worst that can happen she'll be mad at me for a while?