What do you think of me not allowing a girl to run off while she is drunk?
What? Why won't you let her run off?
Because she looks so drunk right now.
Sometimes people behave badly when they have too much to drink, and we can't always be responsible for looking out for them. It's good that you want to look out for this girl while she's drunk, that way she doesn't get hurt. Just be sure not to restrict her movements to the point that she may feel threatened by you.
She seems mad at me.
She's probably mad because you keep trying to meddle in her life, and you should let her go. Care about the people who want your help and let her handle herself.