I asked my parents why they do not allow me to decide when to cut my fingernails (they usually say I must stay within social norms and/or that they do not want me looking like a girl), and they said they will never let me, and if I let them grow too long (their defintion) when I am an adult, they will wait until I sleep and then cut them (they say that about my hair too).
That's really unfortunate. I'm sorry! Try to take comfort in the fact that in a few years you will be an adult and then no one can tell you how to live your life
They're either extremely humouristic people or they're just narrow-minded. I believe they might think you will regret it afterwards, when you don't cut your nails properly, when you get older. Maybe they've been through embarrassing phases themselves and they don't want you to experience anything like that. Or they are concerned about their own reputation and they don't want a son like that. Either way, since you are only thirteen years old, hopefully they will in the future understand that this actually is what you want deep down. And then, they might even be supportive. If they really mean what they're saying, do tell someone because that's really bad parenting.
That's really awful. I'm sorry to hear your parents are like that. They shouldn't treat you that way. Hopefully they'll become more accepting in the future when they see that this isn't just a phase. Try not to let them get you down. You are who you are they need to accept that. (*hug*) In the meantime, it's good that you've come out to some other people and it's important that you know who you are even though your parents may disagree.
You really should consider talking to a teacher or guidance counselor or some other trusted adult about this. Your parents are being beyond ridiculous, and anyone in your position would be struggling. Please keep posting - everyone at EC is here for you+ ready to listen any time. Stay strong
Well tommorow is the last day of school, and the teachers at my school agree with kids getting bruises for punishment (covered with bruises)... so telling them is not a good idea.