Thank you all so much for responding. Well, I may have wanted to do it quietly and as amicably as possible, but he made my choice for me:
Yesterday morning I woke up to him screaming at me for "breaking the door" (I came home, pushed on the door, felt a LITTLE resistance, pushed a little harder and it opened. I figured it was just stuck on the rug). I told him I didn't know what he was talking about. He walked out of the room, and came back with a workboot and proceeded to beat me with it! Then it was all fists and feet and psycho eyes. He wanted me to shut up,and "listen to him" but I was so pissed off that he was losing it again when he swore up and down that he knew it was wrong and must get some help for his obviously chemically imbalanced brain - that I COULD NOT shut up and just lay there so it continued until I left with visible bruises and lacerations on my neck and my head was throbbing, so went to my brother's, since my mother's house was full of company (family who were all here for a big party we had last weekend) - I just wanted some comfort, which he is great for. Well, once I told him what happened he jumped up, grabbed my other brother and we all went to the house to get my things. I did NOT want to call the police, I just wanted to get my stuff, and be gone. My brothers were really good once we got there, oh they yelled at Dan pretty good for hitting their sister but did not go after him becuase they didnt want to wind up in trouble too. Dan was calmer, however during the 45 minutes we were there he paced around, muttering things under his breath and while I was upstairs, I heard my older brother say, "What, are you going to kill me with that?" then I heard Dan say yeah - I ran down the stairs to see him with a huge machete we use for hiking and such and he had stabbed it into the wall. My brothers continued to help me get some stuff and we left. As soon as we got home they called the police and we had to go down for statements and pictures of my injuries. It was a horrible experience, but I had to do it for my brothers who risked their lives for me and asked me if I wanted this to happen to someone else. My boyfriend really showed his unstability yesterday!
So just got off the phone with the sheriff - they only gave him an appearance ticket because he was very cooperative when they went to arrest him and was back home within 2 hours. I must admit I was more worried about him than mad after all of this and all I want is for him to get some help. I was hoping that this would be a wake up call and that he would have to go for mandatory therapy or something.
Right now all is in a state of confusion, but I feel very hopeful for the future, and sad that our lives are forever changed because of his illness that does not allow him to see things for what they really are.
Thanks again for your support - I've appreciated it.