A friend you've known for years suddenly blocked you — everywhere, all at once. No message, no explanation. One day you could see their posts and chat with them; the next, it's like you don't exist to them online. You don't know what you did, or if you did anything. Your mind is racing through everything you can remember, trying to find the moment it went wrong. Did you say something? Did someone tell them something? The silence is the worst part — being cut off with no reason given, left to invent your own. You want to demand an explanation, or pretend you don't care, or beg to be unblocked. You've been deleted from someone's life with no note left behind.