Okay here comes someone who will take it literally as a joke lol.
But here's the thing. Whenever someone asks me for a permission to do something that will have an effect on me, I try to say no if it's something bad for me. But the problem is I tend to let them do it because I AM SO AFRAID that I might hurt them when I say no. In the end, I end up being the one hurted. For example, I let my classmate copy my homework ._. 2 days ago and my teacher will surely find it out and there is a chance that he will call my moom. lol I just can't say no cause I might hurt the ppl I declined/disagreed. And worse, they might spread lies about me.

Someone just please tell me how to say no. It will be useful, dude.