NO, don't do it! I just looked at your profile page and my heart sank when I saw you are only 19. You truely have a whole lifetime ahead of you!
Please tell someone. If there is no one then get yourself to the hospital any way you can and tell a doctor, a nurse, anyone! I have felt like that before and put myself in the hospital for a week about 3 years ago and came out a different person. I never think of suicide anymore. I realized that is really the end. No more. Gone.
YOUR ONLY 19. I don't know if you are married. If not then you probably haven't met your future wife yet, you haven't met your children yet. If you die now, you never will. Give yourself a chance to live.