I'm so sorry that you were sexually assaulted and now are dealing with the residual trauma. That is so unfair.
What you said was in theory, but you know now it doesn't work for you in practice.
I think it's pretty normal to have those conflicting feelings, but please don't feel any guilt.... it's not your fault.
It's good you and your boyfriend are talking about all this and that he is taking responsibility.
Hope others will also chime in and bring words of comfort.
Hope you feel better soon!
Sending you every good wish for healing...