Can I just leave my house like my friend did?

there have been many situations like that and it's still considered kidnapping even though it's his kids too. i wouldn't recommend you stay at boarding school year round or leave your house. you haven't given details on why you want to leave or what your plan is, but just think everything through, it's not as easy as it sounds, it might change everything, you might be caught, there is a lot of risk involved and you may not be happy with the outcome. it would be better to wait till your 18 and then move out on your own. but then again, it depends on every situation, and we can't judge without knowing about your home life. you have to make the decision, but remember to weigh the pros and cons. good luck.