Know that I will be praying for you!
My dad left us when I was in high school, and I have had many friends go through this. I understand much, but never all, of what you are going through. The best I can tell you, beyond I will be praying, is that this is grief of the highest level. It is a very powerful separation you are going through. You need to feel the pain, accept the pain, work through the pain, and you will come out on the other side just fine. Any short cuts you take, namely drugs and alcohol, will only cripple you for years, and any attempts to avoid the pain will only delay it.
Let it hurt, heal well, and we will support you through prayer and anything else we can. Just let us know!