 Boundaries is such an important thing for mental and emotional and relational health. A boundary is a place where I can love you and me simultaneously. Where I can be safe inside my boundary to love you as much as I can and able to without betraying myself and letting your life and your energy and your agenda overrun my boundaries. A boundary protects you. It's not about controlling them. Though they will feel your boundary is about controlling them. Never adjust your boundaries because of someone's emotional reaction to your saying no.