I wasted my potential and now I am feeling guilty?

I was a brilliant student until I was deviated from my path....We are a group of 4 students and always used to be in the top ranks....Then I had an internet,TV addiction and studied very less....My final exam which will decide my career is in 5 days time and I look back and feel guilty.....My friends will do their college degree in RS. 30000 ( $600) while I will end up doing the same degree in Rs. 2500000( $50000) due to my marks and that too in an inferior college....I feel that I have wasted my parents money....I dread that my other 3 friends will get admission in the same college while I will be left out as I don't have good marks....I'm depressed...Please help.