Yes Abhishek, this was a mistake on your part that you lied to your parents. But now what, again is quitting an answer to this. Your parents will be already upset to know that you haven't cleared your exams and then your cowardly behaviour would collapse them.
Why not find a solution, whereby your confidence is revived and your parents feel proud of you too. May it studying hard and clearing CA exams or in whatever manner you think right. And over and above who said and why do you think that not clearing CA exams is end of life??
You haven't even started your life, abhishek!! Becoming CA even is not the end, you'll have to work a lot hard even after that to be successful in real sense. I'm not inspired here by the movies "Three Idiots" or "Taare Zameen Par" but yes the underlying motive is the same, do what will make you feel confident. Take control of your life and not like this by thinking you are a loser, this is not gonna help. Trust me!!
This whole community is with you. Share your thoughts and take guidance from experienced professionals and you'll realize there is much more to life than to end your life for a degree..
I don't know whether my thoughts will change your attitude but may be you'll give a second thought that's all i want, once you think twice i'm sure you'll be convinced - Life has lots in store for you, go grab them!!!