25,no job,Family Dead,Crippled,No Friends or Loved ones,nothing to Live for... Death? if not what should i do?

i'm 25, i lost my job, my best friend/sister is dead, i'm crippled, n i can't heal from any physical ailments i acquire. i have nothing left to live for. No friends, no loved ones. I;ve no one to love, n apparently i'm not one to be loved. Suicide seems to be the only logical, and inevitable conclusion...yet, i can't make up my mind. How should i do it? Should i do it? Any words of truth or understanding wisdo,, or any feedback would be appreciated. p.s. i know i sound like a BizNatch, but i don't expect u to understand, i'd just appreciate an answer to this query.