Why?

Why is it when you ask someone to help you with something they have to turn around and make you feel like a piece of shit because they said yes. Why can't people just be honest and say no it might sting but at least they were honest.

I hate being made to feel like an ass because I ask them to do what they said they would. I hate crying because they get pissed at me because they said yes. I hate feeling like the jerk for expecting them to stick to their word.

They do not have to worry I will finish this on my own I refuse to feel this way again I would rather fail.