Materials expand under heat. Couples expand under stress. The space isn't rejection—it's the physics required to prevent structural damage. The relationship contracts back as the temperature drops.
Atoms bond in different ways: ionic, covalent, metallic, hydrogen. So do people. The type of chemistry you've formed determines whether your relationship is brittle, flexible, or quietly held together by a thousand tiny forces.
In a relationship, you and your partner play driver and engine in turns. Both burn energy. Asking for space isn't withdrawal—it's the engine cooling down so it can keep running.