SA case

I went on a cabin trip with my friend and her friends. I had just met them that same day. That night we got super drunk. Towards the end of the night I went to sleep a little earlier than everyone else. I wake up to one of the guys I met that night taking my clothes off and you know. I was too drunk to understand what was actually going on. I said no repeatedly 3 different times. All he did was shush me and tell me that he was okay. That He was in control. He eventually lets me go after the last time I said no and I go down to the girls room who I had just met that night. I told them what happened. Then I came to the realization that I had just been raped. and they felt so bad cause they had no idea what was going on. They were in their room talking and gossiping and thought I had gone to sleep as well as the guy in his own room. He had been a friend of theirs for about 7 years and would have never thought he would be capable of doing such a thing. Anyways. The next morning they ask him what happened last night and he excitedly told them that he “ate some ass” last night and was bragging about it. Then they told him that things didn’t go the way he think they happened. He was immediately in denial and what not. He said no I actually don’t remember what happened. Fast forward to now almost a year after I reported the case. He got an attorney and basically said he doesn’t remember anything at all. The detective said that they couldn’t do anything more than that unless something comes up or there’s more evidence of some sort. And I feel so upset and frustrated. Is there anything I could ask or do to do something about it? I want something done but I don’t know anything about these kind of cases or like what I could do. I asked the girls if they were willing to testify if I needed them to and they said that would. I should probably ask the detective if he’s already spoken to them. Im literally clueless as to how to go on about this can someone help please.