My first question any time a teenager asks me a question like this is, "Is there a reason you're asking me[in this case the forum] rather than your parents?"
Even the best advice you get here might overlook something simple and extremely helpful that only your folks would think of because they know you best. I do understand that it's not always an option, but I also know that it's sometimes an overlooked option.
One other tip: if your knife is valuable to you, consider whether an inexpensive proximity alarm would be a good investment. Something that will beep when you leave the house/car/shop etc to remind to to put your knife away.
Even the best advice you get here might overlook something simple and extremely helpful that only your folks would think of because they know you best. I do understand that it's not always an option, but I also know that it's sometimes an overlooked option.
One other tip: if your knife is valuable to you, consider whether an inexpensive proximity alarm would be a good investment. Something that will beep when you leave the house/car/shop etc to remind to to put your knife away.