What is when a guy says leave me alone?

When a guy says "leave me alone", it typically means that he wants some space and time to himself. The reasons behind this could be many - he may be feeling overwhelmed, stressed, lost, confused, or just need some alone time. It's important to respect his wishes and give him the space he needs, as pushing him to talk or be around you when he's not ready may further aggravate the situation. It's also important to remember that this is a temporary phase, and he will likely come back when he's ready to talk and reconnect. It's best to give him the time and space he needs while also letting him know that you're there for him if he needs someone to talk to or support from.