What to do?

What can one do? I just feel like giving up on everyone and everything, feels like there's no point anymore, I try my best to appease everyone, even at the cost of my own needs/wants but it just absolutely never enough, everyone in my life has left and im just here wondering and ive come to the conclusion that I'm the problem, im just simply not enough for anyone or anything and I need to accept it because I can't keep inviting people to join my life just for them to use me until they're satisfied and leave... idk im sorry, im jsut venting 😭