I'd be a bit curious about the reasons why his other live-ins did not work out, especially in those cases where the relationships are ongoing. It might be useful to speak with her and find out why she chose to move out (if it was her choice.) Oh, there are plenty of good reasons why people can't live together. But personally, I would just want to make sure I knew what they were, to make sure they're good reasons. If "she was too jealous so I asked her to leave" is on the list, I would stop packing my boxes.
Gralson: my husband (works out of town).
Auto: my girlfriend (lives with her husband Zoffee).
The most dangerous phrase in the English language is "we've always done it this way."