I am so sorry this happened to you when you were in such a vulnerable state. I hope you are able to tell your therapist about it. The freeze response in that situation was not a personal failing but a normal physiological response to threat. It wasn't a "choice". You were not responsible to "choosing" to act in that way rather than a different way. In stressful situations the body is flooded with stress hormones that determine behavior to "increase the chance of surviving the threat". You were flooded with stress hormones that made you freeze. All that really says about the situation was that the mans behavior was so threatening it caused your brain to go into survival mode.

Hopefully when you muster up the courage to talk about this with your therapist there will be no bolts of lightning, only relief.