Young couple with ED

I am a 23 y/o female and my partner is 21 with organic impotence. We have been together for 9 months, living together for the past 3 months. Because of an injury he sustained while in the army he has difficulty getting an erection. I was not aware of his condition for the first 6 months of our relationship but now that we are living together, and only managing to have sex about once every two weeks, I am now painfully aware of how difficult it is going to be to live with this. He does not seem to be as concerned about it as I am due to his decrease in libido. He just doesn't need to have sex with me and this ofcourse is very painful for me. I am hurt, frustrated, angry. I do not know what to do about it. I can't help but feel rejected. I am trying to learn all I can about ED, something I have never encountered before and never thought I would, especially at such a young age. I know that he is physically incapable of getting an erection but knowing this does not help how I feel. I want to be close to my partner, and the lack of sex in our relationship drives us further apart. Or atleast it drives me further away from him. He does not seem as concerned as I am and I wish I knew how to communicate better with him about his ED. I am looking for support online with women who are going through the same thing. Please share with me your story and how you cope.