I effed up big time.
Did you drink too much last night?
I blacked out after drinking too much vodka.
Alcohol can have that effect on people.  The main issue here is that this isn't the first time you've told me about drinking too much.  I think you should get this drinking under control before it costs you anything more than a nasty hangover the next morning.
Why should I listen to you? You're not my boss.
You're right that I have no control over how you choose to live your life, but as someone who wants to help you, I can still offer advice.  If you are feeling the urge to keep drinking, even when you know it has negative consequences, then you need to try to kick the habit.  Alcohol addiction is a serious medical issue, but with the right help, you can get past it.