Hon, no one here is presuming to know who you are, or telling you what to do. They are simply stating it like it is. Threatening self harm via an ultimatum is manipulative and childish, plain and simple.

I can see how this revelation is upsetting to you, however, I feel that you shouldn't be so defensive. Maybe some self care is in order? A calming session of meditation? Whatever helps you to refocus and center yourself and bring your mind into a calm and zen-like state.