It's okay to not pursue legal actions, I just wanted to make sure you knew that you had that option. While I regret not prosecuting my father before the statute of limitations ran out, I have no regrets for not filing a police report against the man who raped me when I was 15 for reasons similar to what you listed above. I want to reiterate what Bill said - it doesn't matter how you dressed or how you acted - it was 100% completely his fault. YOU ARE NOT TO BLAME! There is nothing wrong with being nice either. It was his fault, he made the choice to assault you, and he needs to deal with the consequences.
I'm relieved to hear you are no longer working with him. I'm glad you have hope to hold onto in your darkest moments. Don't let that go!