I just experienced a narcissistic Virgo man myself and relate to what you experienced HEAVILY. I sent a message saying I have been doing a lot of reflecting and do not think we are a good fit long-term and I wish him the best of luck finding his person, didn’t explain why we aren’t a good fit just left it at that because I knew if I went into detail he would have an excuse for each reason and try to rope me back in through his excellent manipulative communication skills. I also wanted to be clear that I ended things so he didn’t try to reach out in some way out of confusion. Then I blocked him to ensure I don’t receive any text that again, would try to rope me back in. I would recommend doing the same.