Why should I stop drinking?

The reason why you should stop drinking is that you love yourself, and you know that too much of it can harm you in the long run. You are aware of its consequences, and the misery it brings you and the people around you. You have a stronghold of this awareness and future impacts of this hobby for you and the people you care about. If you are drinking responsibly then there is nothing wrong with it, but if it is affecting important matters like health, work and social life, that is the time to be aware and find the right solution to stop.