I told her in an email before she was my T. At that time, she was my professor, and SI had come up in class and been discussed, and she just has something about her that made me feel like I could confide in her. I started with a warning that there was something I wanted to say, but she didn't have to read it if she didn't want to know, and then I filled about a page with whatever so that she could stop reading before seeing it in case she didn't want to know. She wrote back the next morning and said, "Don't worry. I read it." And she was very understanding about it. It was like 5 months after that before I started therapy with her, and at that time she wanted me to agree to a no-harm contract, meaning no damage requiring medical intervention, or suicide attempts, without giving her a chance to discuss it with me first. It felt good that she cared enough to ask me to agree to that. She also said back then that she knew she couldn't ask me to stop at that point. But now she does expect me to stop - I've told her a few times that I could stop, but just didn't care enough to stop. Today makes 6 weeks for me.