Sorry you're going though all this. You are so young.
I really wish there are some magic words I could say to you to make it all better, but I'm afraid there are no any.
Most of us here learned that the hard way.
The only thing I can suggest is try to stick around here and learn about alcholims and the way it affects the loved ones as much as you can.
It is a PROGRESSIVE DISEASE. It doesn't get better until A him/herself decides to make it better. That can happen tomorrow, in a year, in 5, 10, 20 years or never. How much time in your life you'd be willing to spend living like this?
I wish you well
Take care of yourself and wellcome