say "no" to people who ask too much of me

Have I ever said that? Have I ever said that to the people that I care about or feel obligated to? NO. Why? I’m too nice. I can’t say no. I have to do everything everyone asks of me. When was the last time I did something because I wanted to? I never get thanks from these people? Would I get thanks from myself? I believe I would. By body would thank me. My mind would thank me. All those selfish people can get their own shit.