i don’t think your parents should meet your partner till you know this is the person you actually want to settle down with & get married to. i’m so big on that. i can’t bring just ANYBODY to my parents.
When I tell someone I don’t like something that they did / do and I see immediate effort to change. The fact I don’t have to constantly remind them or beg them over and over is such a green flag to me because it highlights that my feelings are at the forefront of their mind.