First of all, "take a deep breath". Don't take the case too personally(or seriously), even the situation was very important to you. Every single event in your life always has a reason to happen. There is no moment of waste in our life. Instead of thining negativily, try to change your perception in a positive way(because the negative energy tend to attract to the worst result). You can also put yourself in the third person,so you can see why this problem is happening to you, what is the lesson you can get from it,and what is the best solution you can take etc... In my case, if I could find a good solution, I just remind me of the words from Dalai Lama "If something really really bad happen to your life, you just blame on your karma. Instead of hating your situation(and your life), you should regret what you are paying back your karma of the past... and just accept it as it is.". Sometimes, we are faced with very very difficult incident in the life.... if you think it's out of your control and you can't do anything for making it better.... you just accept it as it is,and let it go.

start drinking... heavily :D

Breathe...

you should talk about it whether with your parents or with your Girl friend, i bet that you will feel better after you talk to someone. but plz don't give up no matter how big the situation is, like what Alexandre said above.:)

Don't give up.