Wow cool story...
Well thanks for all your advise guys.
And no I did not comit suicide... What made you think that?
Pardon my black and humorless sarcasm. Anyway, I wish you luck. High school is tough. Having bad grades, short attention spam, procrastinating a lot and being unmotivated means only one thing: school sucks. You'll feel a lot better if you manage to get to a good university. Studying what you like is a lot better than studying what people throw at you.
Also, find a hobby. I started writing around a year ago and it turned into a really good hobby. It started out as something I did because I was feeling lazy and empty, not in an angsty way but more like feeling useless. It was impossible for me to study. While studying, I always found myself doodling on my notebooks, playing with pencils, "just checking e-mails", picking my lips off, etc after 15 minutes of studying. Oh, and that picking the skin off lips thing started to become a thing around the times when I hit bottom. I was struggling to not end up as a high school dropout at one point and the pressure of having no siblings, combined with the expectations of my family, was making it worse. The fact that I had to give up my lifelong dream didn't help.
I sucked at everything in high school. I was only good at writing but it's not like I could study becoming a writer in college. I gave up on my dreams about becoming a programmer because I sucked at maths. I started having a new lifelong dream about becoming a psychologist. That didn't turn out well too. Because of the shitty education system in my country, I had to learn maths to become a psychologist. I decided to give it all I got but around the times I started to study integral, I realized how much I sucked at maths. No matter how much I studied, I fucked up some trigonometry formulas which I spent hours memorizing and got really bad grades. After getting 5/100 in one exam, I gave up completely.
Around the end of high school, I knew I had to crush my own dreams before it got crushed. I decided to do one thing I knew I could do: translating. I'm currently studying translation and interpretation and I don't have a lifelong dream about "becoming" something this time. I'm not really interested in college. So, I needed a goal, which reminded me of the times when my teachers and classmates were always praising my creative writing skills.
I'm currently working on a novel and my aim is to get it published after I graduate. It's good to have goals which are not about school. Most people just have goals like graduating from college, getting a bachelor's degree or totally nailing the next maths exam. The rest have dreams about "becoming" something. I'm content with what I am. I just have aims about "doing" for now. We'll see how life flows.
I suggest you to have a long-term hobby. It feels good to be motivated towards doing something when everything seems dull and uninteresting.