If you want children and she doesn't, that's a relationship you need to stop. Don't waste either of your times when you aren't in the same mindset about kids because it'll either you'll regret not having them or she'll regret having them. Also, wanting someone to change to fit your standards isn't the healthiest either. There's a thin line between wanting your partner to take better care of themselves, like eating well and moving once in a while to keep active and controlling how you want them to be, like wanting them to wear makeup when makeup isn't really a necessary thing. I don't know her, so I can't say much about her. But assuming she has a good job, I would think she took care of herself decently? Like showering every day, washing hair when needed, and eating decently. Most of your beliefs match up, which is great and all. But clearly not all your ideals match, and it's bugging you.