Moving in....

So here's a question for guys & gals.

Let's say you have an apt. What would classify as someone you're seeing, or your b/f or g/f moving in?

Is it when they leave a toothbrush at your place & spend every night w/you...

Is it when they take showers at your place & stay every night...

Is it when they move their clothes in....

Hmmm....???