[Lonhro]

The girl in this situation is being too demanding.

There is nothing wrong with moving in without being engaged. In fact, even though they apparently spend 6 out of 7 nights a week together, moving in might find out some little problems in their relationship that they otherwise wouldn't know about until they are engaged, if she has her way.

There is two options here for the dude - 1) convince her to move in together without getting engaged but reassure the girl that this doesn't mean he won't marry her in the future and he certainly still does love her, or 2) don't move in. Getting engaged should not be an option here.