is life actually worth living?

Ok, so I honestly don’t know what to do, I’m so  close to breaking. It started two years ago when my dad got cancer for the first time and it’s recently got worse, a couple of months a go I got spiked and raped at a party, then my Gran died the same week. me and my gran were so close, could tell her everything knowing she wont judge me although right now i know she would. I used to self harm but stopped and now thinking about starting again:/ it’s the only release i’ve got, my mum thinks it’s all a big joke, my friend spoke to the college councilor about my suicidal thoughts and they had to phone my mum about it, she keeps making jokes saying “aw you going to go kill yourself now” and stuff like that, i don’t know what I can do to stop it, the councilor thinks I should sit down with my mum and explain how i’m feeling and that everything will be fine, I know it won’t be.. :/ I’m useless i’m failing in college, my tutor at college won’t stop moaning at me to get my work done but I can’t, I can’t concentrate and i’m too dumb to even attempt it…

Some one help me please:'( I don’t want to have to leave my niece, she’s the most special person in the world to me and is the only reason i’m still here