Making dicisions...

I really don't understand that why sometimes our parents just won't listen to us... i'm really really getting very tired of it. can i just make my own dicision for just at least once? i can handle all my stuff myself with my own arrangements. but why they do not think so but instead they think i;m such an irresponsible person i'm seriously upset just because of this word they had dissapoint me as my parents... i'm not saying that they are wrong but can't they just listen to me once??? i really don't know what to do and now i'm having dilemma of something and i'm feeling so badly... i wanna cry but sadly i couldn't Help Me!!!!!!!