He won’t take me to his house

So I’ve been dating this guy for almost 6 months and despite coming to my house about twice a week every week, he won’t take me to his. He has said from the start he has his own house, and told me around Christmas time (after my friends made a joke about me never going to his) that his mum is sick and has been staying with him. He will drive home from work or gym and speak to me on his car Bluetooth and then sit outside his house, in his car and speak to me, instead of taking his phone inside. I don’t even know where he stays, he won’t talk about it. I keep trying to put it out of my mind but it just doesn’t seem normal to me. We are both adults with professional careers, and yet I’ve never been to his house, met his friends, he never talks about his family and so on.

I know what people are going to say, speak to him, but I’ve been lied to, cheated on and treated so badly in the past (it was a very abusive relationship) and I need to know if this is weird (I think it is) or if it’s all in my head before I do anything. I know to get any answers I’m going to have to speak to him but what if I don’t get the truth and just get fobbed off some more? I need some straight talking.

*edit*

This is what I’m scared of guys. It just doesn’t seem right. Maybe I’d understand more if he told me anything but he won’t even talk about what’s actually wrong with his mum, so I’m left to just guess the details and believe that this crazy story is actually true. I’m annoyed so I don’t even want to talk to him about it just now, I’m scared I’ll get upset and won’t talk about it rationally.

I was going to say I can’t turn up because I don’t know where he lives except from a rough area but I never thought of checking his driving licence for an address. I don’t know if I’d have the balls to just turn up but at least I’d know where he lives for a start. Thank you guys I’m devastated, I can’t believe I might need to go through all this again, my confidence is shot but better finding out now I suppose.