why cant u just leave me alone?

i thought i already told you that i cant help you on this and im very sorry. but why do you have to keep on bugging me, asking me to do things that me myself is not capable of while having other commitment to do as well? its not that i dont want to help you, believe me i want to but i simply cant. now ur making my head spins while searching for the best answer to give you and reject your favour. Im really bad in saying NO to people, especially when they are my friends...