Abusive relationship


So long story short I thought this guy was beyond perfect.. until he’d drink. He would get very abusive and mood swings, wouldn’t remember anything the next day. He has a problem but won’t get help. He ended up pulling my hair and pulled me outside a bar where people surrendered us to help. He then left me scared and alone I knew that was the last straw. I 100% know he’s not the one and won’t get back with him but I’m just so sad and upset that this happened. Feeling ashamed and stupid for believing he was the one for once and it all went to shit. What is the best advice to give so I can keep moving forward?