Adult Roommate Maturity Conflict?

This girl is stressing you out. Roommates are like having a marriage, there has to be compatibility. she's content on being irresponsible and you're not. Why continue to be miserable? she's not your responibility to train to be a better person. Tell her this isn't going to work and give yourselves 60 days to make other arrangements. (this will be a lessoned learned for her that she'll get sooner or later)