Well, i would say it more delicately than that, but you are getting some hand sir...
I am doing what is best for the situation by being honest and civil - join me whenever you like. You can stay at the house as long as you AGREE to civilized respectable cohabitation, otherwise your belongings will have to be removed and you can deal with the problems of living elsewhere and I will enjoy the home on my own.
There are a few problems with yours :
1. Telling her she's doign what's best for her is WRONG.. she's doing a lot fo DAMAGE to herself, don't validate destructive behviour by telling her it IS best for her when its not.
2. Dont tell her you are doing whats best for YOU.. it just invites her to be equally selfish. What's best for the SITUATION or something like that implies you ARE taking her feelings into account and you expect HER to do likewise.
3. Telling HER to get her stuff out gives HER HAND... you just tel her it HAS to go and leave it in the air ...
4. Make your own way doen'st warn her about the unpleasant discomforts she is headed for by moving into an apartment... I used to live in one, I KNOW a house is better.
