Say the limit. Skip the paragraph of apology.
What kind of limit is this?
A boundary is about what you will do, not about controlling them.
Edit it into your own voice
Notice how much of your draft is apology. One sentence of warmth is generous. Three is usually fear.
APSTORA supports reflection and education. It is not therapy, diagnosis, crisis care, or a substitute for professional support. If you are in danger or in crisis, contact local emergency services.