Dear Amy: I'm 17 years old and have a twin brother.
Recently my parents went out of town, and my brother wanted to throw a party.
I didn't want to be there because I had plans in the morning, but I decided to stay up to make sure nothing got out of hand.
At 11 p.m. someone brought an incredible quantity of alcohol and 20 guests showed up. They all began to drink heavily, and soon someone was feeling sick and wanted to go home.
I drove her home myself (I was the only sober person there). When I returned home, the place was a nightmare. Everyone, including my brother, was drunk. People were vomiting, there was broken glass on the floor, and someone had cut his foot and was bleeding heavily.
I almost called 911, but a sober friend showed up and persuaded me not to. Finally, the guests and my friend all fell asleep, but I stayed up all night checking on each one. I am certain that one particular person would have died had I not done this.
In the morning I drove them all home while my brother cleaned up, and I have felt guilty and angry at my brother ever since. He tells me I am being dramatic, and I should forgive him. Did I do the right thing? Should I forgive him?
— Terrified twin
Dear Twin: You should forgive your twin — but the route to forgiveness is smoothest when it is paved with an acknowledgment that someone has erred, along with a request to be forgiven. Has your brother done either of these things?
You sound amazingly responsible. But this is an extreme note of caution for you and any other young people who may find themselves in your situation (now that the school year has started, many high school and college students will be facing this challenge).
If you are ever in a situation where you think to yourself, "I wonder if I should call 911 … " Call 911. Do it. Alcohol is an extremely dangerous drug and an overdose can kill you.
In addition to the injuries (such as happened at your house), drinking can cause violence, unwanted or unintended sexual activity, destruction of property and violations of trust and friendships.
Your toughest job is still ahead. You must tell your parents about this. Your brother's choice could have cost your family everything. They should never leave you two home alone overnight again.
You can contact Amy Dickinson via email at firstname.lastname@example.org, follow her on Twitter @askingamy or "like" her on Facebook.