Been with BF together a while now (about a year). The reason why I'm wondering this is because he has never invited me to his house. Ever. Our whole relationship has taken place from my house and a couple of bars in between our houses, which we go to once a month. He told me this was because he was doing work to his house. The other week I was really direct and asked him when he was going to invite me over and he said when the work is finished, ie, mid 2019. I've driven past his road a couple of times and there is scaffolding outside, so I do believe he's having work done. I just find it really odd that he wouldn't want to show me where he lives. He's also never introduced me to any of his friends (I'm digging my heels in with this one and not introducing him to any of my friends until he initiates).
I think my concern is that he has someone more serious that he doesn't want me to know about.