Most Helpful Guy
You might be the other woman. Him needing some time may be him trying to smoothes things out with his wife/girlfriend. Or he could be living with his parents or family member. Or he could just be sharing a place with someone and he doesn't have any privacy. Or his place could just be dirty and messy. Either way, it is slightly suspicious knowing him and dating him for so long without ever being at his place. You can just ask him why you never have been over to his place. See what his answer is.
Most Helpful Girl
He probably has a family. You may be a side chick. Or he doesn't have his own place might live at home with mom. So just ask but i feel like he's being shady. Eight to 12 months is a long time for you not to know where he lives... four months is a long time for you not to know. Especially if you have established a relationship.