I think its also important to acknowledge that you are / were worried about them. Considering how kind and respectful you are, I doubt that your words "made" this person do something hurtful to themselves. Also while every one of us affects our environment and those around us, we don't have as much influence on people as we sometimes think we do. There is a thought distortion that over emphasizes the effect one has on another. I'm not saying you are experiencing this but at the same time it's a possibility. Lastly, this is where this person is at (they are not open to hearing feedback about their behavior, possibly take it as criticism, possibly don't respect your requests and needs, may be struggling themselves). This is where you are at (caring about this other person, sticking up for yourself, worrying about this other person). I understand your fear in having forgotten their name / handle. Its something I might worry about too. But this is something you can't control. I would also suggest you do not need to apologize to them. I understand you may want to express you care. I'm sorry you can't, with this person. Hugs. When you're ready, focus on what you can control: do something nice for yourself. Do something nice for someone else. Spend time with people you love. Do something you enjoy. When I'm struggling, I tell myself that it won't always be like this. Emotions and situations are like waves. They come, and they go.