My SO doesn't want to retire early either, and that's fine. I don't really think about retiring now, I just want to have the option to leave and to scale back to take care of kids one day and still travel like it's going out of style.
When I tried to explain to him the concept of early retirement, he looked strangely at me and explained that he loves his job.
But when I suggested to him that he could get the option of only working 20-30 hours per week and having more time for himself plus never having to worry about how to support children that are to come over the next years or me, or us both if we get sick and can't work anymore, and that that there wouldn't be any worries about the reduction of pensions due to demografic change, he became excited! Right now, we don't have a common concept or plan, and that is also fine. He is so naturally frugal and just doesn't want anything, and I will take care of it and surprise him when it's done :)