Why does no one care, like im a worthless person and a nobody?

you are not worthless and if they really dont care F em, you are probably a great person and will one day im sure find a person that loves you so much that your "family" (which isnt truly a family if they dont care) wont even matter - sure you are related to them but that doesnt mean you have to stick with them - if they really dont care then leave em behind in the dust you dont need them.