I am honestly done

My best friend cares about other people loves other people more i am not saying that he cant do that but why?.... he always wants to kill himself i see hes posts but i dont say anything bc it never really fucking works my words dont help him stop he always says "I wont do it " Its okay dw i wont do it" but he always posts about killing himself i dont know what to do i cant even think straight he always does this people care about him love him i wish people also were like that towards me.... I have had enough. I am done caring.i am done trusting ITS NOT FUCKING WORTH IT AND I WILL KILL MYSELF TRUST THE ONLY PERSON YOU WOULD PROLLY EVER SEE IN HERE IS MY SISTER .