I've moved in once with someone after dating less than a year. It was a disaster. I will never Never NEVER do it again.
Please, be careful.

My ex was a real PITA, but now that we've been apart for a couple years, there are sweet little cards, presents, little notes with clippings from newspapers and magazines. (even presents for my son every birthday and Christmas)

Meanwhile, I can't get some of my precious belongings back. They've been "thrown away."

It's weird, it's kind of sick, it's very manipulative.

Exes are exes, make them stay that way in reality and in your mind. What you had always looks better when you're feeling lonely or insecure, recognize you're going to feel that way occaisionally, and just ride it out.

It does get easier as time goes by.