Giving a kidney to a loved one?

would u give up a kidney for your sibling? I have been asked if i would give 1 up for my brother but the problem is that I'm really scared about the complications and maybe even death. I'm so confused and don't know what to do.. I love him to death of course and I don't wanna lose him so soon but I also have to think of myself. I'm not being selfish but I'm just really worried about the complications and if his body rejects it then my kidney will just have been wasted. The other thing that has me saying i don't wanna go thru with it is that my brother has never taken care of his body even since he got diagnosed with diabetes and is now on dialysis. I'm pretty sure he's still not gonna take care of himself after the surgery so will this procedure really be of help? Please offer me ur thoughts.. I really need some help. I'm sorry if some of this didn't make sense or if I misspelled words but i'm litterally shaking cuz i'm confused and worried so just try ur best to understand what i typed. thanks you all.