How much alcohol is too much?

And i dont wanna hear the 3-4 units daily thing. I mean how much is it where it starts to get dangerous? I only drink usually around 3 nights a week, but I probably drink around the equivalent of 14 pints a night. By that i mean sometimes i have spirits and that instead of just lager or cider. If you're american a pint is around just over half a litre, about 550ml i think, im sure you have pints over there but in the uk if you order a beer you'll get a pint of it. The only thing that worries me sometimes is that after a bender my kidneys ache, plus it also makes me really anxious, as in jumpy and easily frightened, sometimes i feel mild depression but to be honest i'd prefer that to the anxiety, the only thing i know will get me out of it is going out on the piss again. I know what people will say about that, slippery slope and all that but usually if it gets bad i'll have a few drinks to kill off the anxiety but not enough to make me like it the next day, so it's like coming off drink slowly. Im 21 now and have been drinking regularly since about 15, and its hard not to drink as the majority of british people live for the weekend and weekends mean alcohol