Notes

Okay.
So, I am not really sure where I should start from and what is the core issue here.
I'm graduating from high school in.. well, just 3 weeks actually. I spent my previous academic year in the US, I was an exchange student, and I'm finishing my studies in my own country. While my previous year was just amazing, this one sucks.
This also means I live with my parents now, back with them, which has been really bad for me. They pretty much hate each other, plus there are many other issues with that, like dad (military man, PTSD, treating everyone like garbage) and mom (weak-willed, talks about her desire to die all the time). I also have a younger brother who just makes things worth. Anyways, it's unbearable for me to stay in this place. I don't really talk to them, mostly being in my room. Not that they really want that either.
As I'm finishing high school, I have my exams in a couple of weeks. Those would determine if I will enter a university. I'm smart, there is no doubt about that, but I barely touch my notes and books. Just can't concentrate and focus to do something. It just seems to much. But that's stressing too.
I work, actually have 3 jobs and another side projects that allow me earn something to support myself. Don't really rely much on my parents and I'm trying to save up to pay my tuition. I find it especially hard to cope with all of my jobs now and it's like I don't have any motivation. Like I'm burned out. There are days I just spend in bed and can't find any reason to actually get up.
I don't have much friends, never had actually. Lost my best one 3-4 years ago. Currently have a boyfirend, love him with everything I have. That's like the best thing in my life. But also have a lot of trust issues, that is actually because of that friend I lost quite a long time ago. So it makes me doubt everything and everyone, I don't know if I'm actually loved or if some just wants to hurt me.
It all just feels so bad right now, I can't even. For a couple of weeks now I can't sleep properly, can't fall asleep or spend too much time sleeping, can't eat or eat too much, my heart is pounding and worries don't leave my mind.
I feel fine for an hour or two, and then it comes back and I just can't cope with all that.
My moods change fast and it's exhausting to say the least.
Sorry, that's more than a 2-3 sentences, but I just need to get it out.