I agree with Mouseclick it would be good if you could tell us more about yourself and why you want to fast.
I also agree with latinmess, the only person who can make you fast is you. You have to make up your mind that your going to do it, then do it. Your mind is a powerful tool, you can use it to achieve your goals.
People here can support you if detox gets rough, or if you have questions about what's happening, but only you have the power to stay on your fast. So ultimately it's up to you.