I feel like their is no escape from my anxiety

My brother sells cocaine and has admitted to me horrible things. I want to help him and get him to stop and i have but he just outbursts and tells me to mind my business, I feel as if their is no escape from the anxiety that something will happen to him, I hate school, lack caring friends, and every time I talk to them and ask how my brothers doing I have to lie. It makes me so depressed hearing other kids talk about their own grades (I am failing) and hearing them talk about all the amazing things their siblings and families have done. My parents have practically given up on him and are just waiting for the year to end and him to move out. I also cannot get a single thing done without thinking about everything their is not a single second in every day that I am not thinking about everything that is going on in my life and how I so badly want it to just be okay. I just want things to be okay and not constant fear, I cant even do my homework without having intense anxiety about how better everyone else's family is. I had my birthday alone with my mom with shitty costco burgers I just want it to stop all of it but whenever I try to focus in on a problem another slams down, their is literally no escape, I will live like this forever and I know it. I have tried antidepressants (SSRIs) but they made me so dethatched from reality that I didnt have any sense in important problems. I cant go a day without something tragic invading my brain. I cant go a day seeing all the mental pain in my life I just want everything to be fine. I go to my friends house see their family and just cant take it. i rarley talk to my parents and I dont have any mentor, nothing to work for, no one to impress, nothing but things to end what I care about. I can tell that this will never escape my life, I would want to just move away to a new town and start over but I will never be able to forget the pain I am in, I need this to end but their is no resolution, every single problem in my life is left in others peoples hands and all of them are full throttle terrible, someone please help me.