You sound like you are very gifted, but not being challenged. Are you taking advanced level classes to keep you engaged?
You love music, building and pet keeping. Are you planning to go to college to become a musician, architect or veterinarian? Have you thought what you want to do when you get out of school, or better yet, what type of career you want?
It's been many moons ago for me (but feels like yesterday) that I was in high school. I didn't like high school either, but I have to tell you, if you have the opportunity to go to college - take it! It's SO much better than high school.
As I've aged, I've gotten to where I really appreciate my education now (I did go onto a university after high school).
If you want to go to college, you need to keep your grades up - does that motivate you at all?
It is tough when you are trying to protect your parents, but maybe if you tell them that it's nothing that they did, but you need them to know how you are feeling. They may feel very honored that you trust them and they raised you to trust them to be able to share anything with them. And they may be able to help you.
You're also going through a scarey time. 2 years before you graduate and if you don't have plans after that - and even becoming an adult is a scarey transistion. But it's normal. We've all been through that before.
Enjoy the rest of your summer break! Some kids here in Atlanta went back to school this week, and the remainder go back to school next Monday. I can't believe how early school is starting now! We didn't start until after Labor Day.
Take care!