What is when she says leave me alone?

When someone says "leave me alone", it usually indicates that they want to be left to themselves and don't want interaction or interference from others. They may be feeling overwhelmed, stressed out, or simply not in the mood for socializing. It's important to respect the boundaries of someone who says this and give them the space they need. It's also important to check in on them later and see if they would like to talk or if they still need space.