Vicky - defiantly need to lower basal, as others have said, and start testing on a more regular basis.
It sounds like he's got himself set into a comfortable regime with his diabetes, and resistant to changing it because he's used to it, and its a hassle to change it. Have been there until recently - having more hypos, losing awareness and getting 1.8 on the meter didn't phase me, because I thought I knew enough about how my body worked to catch it in time and compensate. Changing seemed a little too much of an hassle, because I'd have to interrupt my routine and start actually looking at what I was doing. "Too much hassle and 1.8's not really all that low is it? " :roll: Have just changed my medications and trying to get more control, and yes, its a bit of an hassle, but I know its going to be worth it in the end, so I don't mind too much.
If you have an hypo that gets to those levels, but you don't have any symptoms, you tend to brush it off. You know its bad, but in a logical way, you don't have the emotional impact a really bad hypo gives you when your body reacts normally and you can't test because your hands are shaking too much. Had my first bad one after changing my medications 2 days ago - 'only' 2.8 but full symptoms, and it shook me up in a way the 1.8 never did. I needed to lower my basal too, its surprising how much of an effect it has, you sometimes don't realise it.
what will get him to snap him out of it is hard to say. For me, it was a case of having already made a few changes in my life, and felt I had sorted out the rest of my life enough to have the time to concentrate my efforts on getting my diabetes under more control.
For him, well, I don't know what his life's like, but it might help to have a think about what his routine is like and what sort of things you could both do to make it easier for him in the period when he is adjusting. If you broach the subject and he complains that such and such a thing means he can't test, or that he's too busy, then you can tell him some of the things you could do that means it shouldn't be a problem. When he goes to the dietician he's going to be getting a lot of advice. Whether he actually takes it or not may be hard to say, but if its not too hard, and he knows he has the full support of you and his medical team, he might be more receptive.
As far as the pump - as iHs says - worth it but can be a lot of hard work, he probably isn't really in the frame of mind right now to have to make such a major adjustment.
Its probably going to be a team effort to get it sorted, but you sound like you really want to help, and you are doing the right thing by coming and getting advice. I think you will manage if you can get your parter on side. So best of luck.