I'm having suicidal thoughts?

I'm in highschool for the last little while my life has been going terrible. I got a concussion got robbed and got suspended from school for 10 days in the period of three days. at the moment all my luck has gone away and when people look at me all they see is a happy guy cause thats all i feel i can ever show when really i just want to punch everybody i see. My grandpa is dieing I can't consentrate I have started waking up an hour earlier because of an extra punishment for my suspension. I have started having stomach problems and I am in constant physical and emotional pain sometimes I can't get through a day without going to the bathroom for 20 minutes to convince myself not to kill myself I need to leave this place. I can't stand living with my family because I can't be myself around them, they try to support me but the only time I can ever be myself is when I'm in my room with the door locked. I have a high IQ and find school extremely easy so I'm always bored and never to my work I meen never I haven't taken 1 note since the beginning of the year and I am passing with a 60 average I'm always bored and nevr comfortable I can't sit still in class because I just can't get comfortable. I was smoking weed at least 4 times a day since october and slowed down recently.My mom caught malaria in december because she went to nigeria. she had to close down her business and now there is no money flow in our house. my mom is supporting but she wouldn't understand I can't share this with her. I was never really happy I can't remember before I was 12 though I do remember that I was depressed in grade 7-9 I am in grade 10. things were starting to look up but then everything just became worse. I hate my life and I just want to leave all my problems behind. recently I've been thinking either I can run away or kill myself. I've started to like hurting myself because I don't feel anything any other time. My life from the outside looks like I'm turning it around because I am I just want to die and leave all this pain. I din't have a good childhood in a sense my earliest memory is of my parents fighting, then my dog dieing, then my gradpa being diagnosed with ulseimers (I don't have any memories of him), then my parents getting divorced in a pretty bad divorce, moving a couple times and finally ending up in a place where I had no friends until I started smoking PLEASE HELP ME I CANT HANDLE MY LIFE