If he can't see that there's a problem, then it's up to you to decide if you want to be in the same place in 10/20/30 years' time. If he loves you like a friend then maybe you can agree to part amicably, which would be better for both of you as well as for your DD.
I think you need to make it clear that you can't carry on like this. Perhaps if he realises that you mean business, he'll have a rethink. Otherwise, he'll brush the problem under the carpet and hope it'll go away.
If you were to divorce, he would have to support you and DD. Any financial settlement would be based on his income and your joint assets. He can't just hide everything.
I know it's a huge decision to make, but I can't imagine that time is going to make the picture any rosier, is it?
You still have so much of your life ahead of you, perhaps now is the time to make the change you need. You can do this on your own - I did. Although my circumstances were different (ex had an affair and left), I handled the divorce on my own, my 3 DC are fine, they live with me and are well provided for. Getting divorced doesn't mean that you'll lose everything.
And perhaps seeing you make a move towards a happier place will help your DD. Mine is the same age - at this stage they're very interested in looking at adult relationships and interactions. Wouldn't it be good to show her how strong you can be, by taking some positive steps?