What is he says he needs time to clear his head?

When someone says that they need time to clear their head, it usually means that they need some space and time alone to reflect and process their thoughts and emotions. They may be feeling overwhelmed, confused, or anxious about something in their life, and need some time to sort through their feelings and come to a decision. This can be a healthy way for someone to cope and take care of themselves emotionally, but it's important to communicate with others so they understand why this person needs some time apart.