Read ;-; (long post but I need advice 😭)

Okay so I'm a 17 year old Latina who is about to turn 18 in two weeks, I am ready for college and graduate high school the day after my birthday. Naturally I feel as though I have my life planned out, I have a boyfriend and I've been dating him for roughly four months now, and he was my crush since my freshman year, now here's the problem. Being a Latina women, I have strict parents that will not, under any circumstances allow me to date or have a boyfriend. I just find it unfair, they had children at my age already, and my sister who is already 20 isn't allowed to date either. How can I finally convince my parents that I am ready. They usually avoid these kinds of topics or tell me to shut up because I'm being stupid. They have met my boyfriend, only they don't know he is my boyfriend but I'm sure they suspect it at this point, but they absolutely hate him. I don't know what to do :/ like me and my boyfriend have done a lot, I feel he's the one for me and he's taken my first kiss to my virginity, and I don't want to lose him just because my parents won't let me date until I'm like 60 lol.