How do I leave

I’m in the most toxic relationship. I’ve been with him since I was 16 years old: we have a beautiful 18 month old baby girl together. He drinks all the time and is awful to me constantly bullying me and putting me down. Calling me horrible names in front of her. I’m not happy and haven’t been.. I don’t know why I’m so scared to leave but I am. I just know in my heart I don’t deserve this and most importantly my daughter doesn’t... I need to find the courage to gather my things and be on my own so she has the best.. I just need encouragement and support.