Welcome Benat!
I am on day 5 of quitting drinking, and have actually had a very similar situation as you. I am 22 years old, started drinking at 13 and started drinking a lot at 17. I also mostly binged on the weekends and did not see it as a problem until the last couple of years. The progression you described sounds awfully familiar and I also noticed the effects that alcohol was beginning to have on my body, mind and emotions. Coming to these forums was a good decision, as there is a lot of information on quitting. That is good that you have a counselor, you are already taking the correct steps by continuing to find a way to sobriety. It is a lot easier if you just take it one craving at a time, whether that be every second, every day or just once a week. Don't think too far ahead, and when your mind tries to sway you to have a drink - take a look in the mirror and evaluate what alcohol has done to your body and mind, and where it will take you if you continue to be friends with it.
Best wishes.
-vincho