This is a bit of a zombie thread, given it was originally posted 6+ months ago, but in case @Lostwifehelp is still around:
I think you're falling into the fundamental attribution error of "I do this thing in this particular way, and therefore I can't imagine/believe that any other human does this thing in any other way".
Take that thought and start applying it to other areas of life, and it soon becomes apparent how silly it is - but it's a very common way of thinking and a big source of misunderstandings in general.
You're very visual, apparently, so that is how your desire and attraction works. Ok, great, that's a good thing to know.
But some people just don't process visually, and it doesn't work the same way for them. It doesn't for me. I'm very attracted to my partner (& was to past ones), but no, I don't have very much interest in looking at him, and my physical attraction is virtually not at all based on how someone looks.
It's based on smell, connection, how I feel about them, hugs, conversation etc. All those things give me a physical response. Looking at him.... No.
I can look and see "oh, he has nice eyes" or whatever, but it's aesthetic, like looking at a painting or something similar. There's virtually no emotion and no desire at all attached to it. I just don't process that way. I love him, but I love the physical reality of him and my conception/perception/idea of him. His appearance - no, not so much. Not that I don't like it, I just genuinely don't think about it, it's not an important part of who he is to me.
If you feel unloved and unwanted, that's for sure something to address with him. But essentially demanding that he does something very personal in the way you do it, because you don't believe any other way is real.... That's not only unreasonable, it's also pretty much impossible for him. How he experiences attraction is as natural to him as the way you do it is to you.
Ok, maybe they're different. Maybe you need to learn to attune a bit more to how he does show you he loves you, and maybe he needs to understand a bit more about what makes you feel loved and wanted, and make an effort to meet you half way.
But there's no one size fits all, and it doesn't sound like his behaviour has changed over your relationship. When you ask him, he's tried to reassure you... So maybe you just need to explain a little more explicitly how you feel and what you need, and also try to understand a little more that maybe he's different to you in this way.