Scared of relationships

I’m 20 and so beyond terrified of relationships bc my parents have an unhealthy one. I want a boyfriend so badly, but I’m always too scared to get to that stage. I’m scared of fighting, breaking up, introducing someone to my parents, and committing to someone who I may realize I’m not meant to be with. Any advice on how to get over this is appreciated. I know this is all part of life, but being the oldest child and seeing a relationship like my parents makes me scared.