Is it normal to want to be alone when upset?
Yep.Totally normal
Yes. Lots of people need quiet and space to sort through their feelings when they’re upset; others prefer company, and both are normal.
Wanting to be alone can give you room to calm down, think, or just feel what you’re feeling without having to explain it. There’s no one correct way to handle a bad mood—some people want a hug, while others want the emotional equivalent of “please give me a minute.”
It can help to let people close to you know that taking space isn’t the same as rejecting them. If you tend to disappear for a long time or feel lonely afterward, you could try asking for a little quiet first, then checking in when you’re ready.