I CANT BELIEVE MY MUM HAS JUST SED THAT!!!!!!

oh my god today i have felt really down..i just feel so worthless i think my life would be better if i was dead!  my mum has just told me she doesnt think shes gonna live much longer!im scared theres something shes not telling meI DONT NO WHAT TO DO!why is everyone leaving me!im not strong enough to make it on my own!, i wanna diehow can i live without my mum.i knwo we dont always see eye to eye but shes the only person i have got left. THIS IS THE END GOODBYE EVERYONETHANK YOU SAM YOU HAVE BEEN AN ABSOLUTE STAR! YOU HELPED ME SO MUCH, I JUST THINK I SHOULD GO INSTEAD OF MY MUM