General truth, just being put out in the open

Why do i always try to help other people? why? EVERY time i try to help someone go through a really difficult time.. all that i get is shit.. why do i bother? Why do i bother when i know that no matter what… whatever i do clearly isnt going to do anything or mean anything.. this happens all the time.. this isnt the first, or the 5th or the 12th.. and it sure as hell wont be the last.. why do i care so much? why do i have to love someone so much and put so much into them, just to get spit on..? Maybe its time to become heartless and a total *****..