How To Get Justice After Being Violently Attacked By Neighbor

I was brutally attacked by a neighbor and beaten in the head until I was unconscious. I was brought to the ER and suffered a concussion, 2 broken ribs, multiple cuts, scrapes, and bruises to my face, head, and legs. I called 911 and the attacker said it was a fight so they believed him and did not arrest. I was advised that a criminal complaint at court might not go anywhere because the police didn’t charge. There were no witness besides my teenage daughter and no video of the attack. I feel so betrayed by the justice system and so shocked the police would not protect a victim of a crime. Is there anything I can do? I’ve been living a nightmare and was in extreme pain for 2 weeks my lips and mouth were so badly damaged and still not back to more as my ribs are still painful from being broken.