I don't have the will to live anymore?

I was like any other teenager, with hopes and dreams, but nowI feel pathetic, insignificant, and as if I have wasted my parents time and money. It all started two years ago when I have enrolled in the IB program. It severely lowered my marks compared to grade 9, and from then on, I have never been able to recover from it. Last year, I received a 61 in English 10 which was a huge blow to my marks. My sentence structure, vocabulary and grammar is awful. Even to this day, my dad tells me that I am a disgrace of a son. Day after day, I am reminded of my failure. I have tried to drop the program but my parents won't allow it. They think I have the potential to continue on. During last symester, I again failed another course; Math 30. I studied weeks ahead of the Diploma exam and my dad even paid $150 for a prep course. To no avail, it didn't make any difference and my final mark was 58% This greatly dissapointed my parents, but it killed me inside to both see them that sad, but also at how stupid I am. For the first time in my life, I started thinking about suicide. Now my dad has two things to scold me about. He has litaerally told me of how stupid and incompetant I am at every meal, and I don't blame him. It's my fault. Everything is. I am a huge dissapointment to my family. To add to that, my dad absolutely despises me for my long spikey hair. He says I look like an Asian punk, and that the only reason he still keeps me in his house is because I am his son. Now's the ending of the school year and guess what? I failed another course. This time calculus. 37% has got to be the saddest excuse of a mark ever recorded. As for my other marks, I passed with 50's again. What suprised me this time was that I tried. Honestly I did. I don't know what to do anymore. I've lost all hope in myself and in life. My friends say I smile all the time and am possibly the happiest person on earth, but that smile is just to hide the sad truth. That I am miserable and always thinking of killing myself. The only thing that keeps my living on is my loving parents, but even now I can't think of confronting them with another setof bad marks. My dad also tells me eacha and every day, that I have to get into university. If I don't he will have to wear a "paper bag" over his head to cover up the shame I have brought. It saddens me that I will never be able to make my parents proud. Just yesterday, someone tried speeding a red light and almost hit me. Unlike other's instinct to run I no longer fear death, and just slowly walked on, hoping he ends my miserable life here and now. I can no longer bare to see my parents dissapointment. Report cards come home in a week and I don't intent to bring home any bad news. I plan to jump off a bridge onto a highway, where a passing car will ensure I won't be able to live and become an even bigger burden to my parents. I know suicide is not the answer, but I am weak, a coward. I know my death will greatly sadden my parents, but atleast now they won't have to spend countless amounts of money just trying to get me into university, and they won't suffer anymore for my mistakes. My death will cost them alot of money, but in the long run, they will be glad they didn't spend 10 times as much on my education with no success. I have never felt comfortable talking to anyone about my feelings, but I can no longer bare this pain. My life feels like a nightmare which I cannot wake up from. I have never been very religous, but god forgive me for what I am about to do.