Communication Problems

So, when I was 11, I was sexually abused by a family member. That still follows me around everywhere, unfortunately even into my relationship. The person I'm seeing knows about my experience with sexual assault, but I don't quite think he gets it. I have bad trust issues as a result of my experience, and a part of that is that I have trouble communicating what I need or want, because it's kind of been disciplined into me that what I want doesn't matter (my abuser convinced me of this over time), and I've told my partner this, but he still gets upset when I don't tell him things I need, even when I want to, and I still I don't think he understands just how much that experience damaged me. What should I do?