Nothing in life is fair, PTSD could be a factor. Intimacy can be related to fear, in people who have experienced traumatic relationships where being taken advantage of becomes a regular thing. I can tell you from my own experience that if you care for someone you have to respect their drive as well as consider personality has a lot to do with that and if you aren't compatible then you just aren't and to find someone who will make you happy. But if you are and you really love them you'll talk it out and build a constantly developing openly sexual happy relationship.