PSA Being Nice

Why is it so hard to receive kindness from others? Please tell me why i am wasting my time caring for all you people that i show generous amounts of kindness to. Am I wasting my time on people? Do they even care that i care? I am a nice person so why is my kindness getting thrown back in my face lately? I am starting to think it isn't worth it to be nice anymore and that i should be a bitch all the time from now on and lose my sense of humor and like do a 180 on my life and what i believe in...is that what everyone wants...it has to be unanimous.