When your Casanova suggests that you move in with him (or when he asks to move in with you), ask him two questions: “Where’s my ring?” and “When do you want to have the wedding?” If he can’t answer those questions, walk away.
And don’t look back.
That's because couples who think that it's better to live together instead of getting married (or before getting married) are setting themselves up for unhappy marriages/unfulfilled relationships and a higher chance of divorce. And it tends to be the girls who suffer more!
Check out some of the relevant statistics here