I (21F) am about to be married to my fianc? (24M) and am concerned that he is completely physically uninterested in me.

Hi all! I (21F) am currently in a relationship that feels near perfect 90% of the time with my soon-to-be husband who I'll refer to as Jake (24M). Jake and I have been together for almost a year and things honestly couldn't be better. Soon after entering the relationship, he told me about some trauma he had been through as a kid where he was introduced to porn by his sh*t father before he was ten and had devolved an unhealthy obsession with it.
By the time I had met him and we started dating, he said that he had healed from experience, but had issues when it came to performance, as in, he had trouble finishing. Similar to most couples, the first handful of our months together were blissful. S*x with him was (and still is) amazing; however, the frequency of s*x we were having took a severe decline after the first five months together or so. I don't know what it was, and he would tip-toe around the question when asked. I'm aware that the honeymoon phase doesn't stick around forever, but in a way, it feels like we're still in it with how we talk and communicate--s*x is just the only place where we fall short.
I think it's important to note that when we do have s*x, he never faces me or looks at me; it's just the same position where we're both on our side. It makes me feel less desired or like he doesn't like to look at me. I've tried to change this and have mentioned it before, he says it's what feels best. We also never make out, in the entirety of our we've only done it once or twice--so there's never really any foreplay. I don't believe it's a hygiene issue on either end because we're both pretty anal about our hygiene.
The decline in s*x has made me doubtful of whether he finds me physically attractive. It has also made me feel like I'm not important to him or that he's getting uninterested in our relationship. I additionally have an unfortunate past when it comes to s*x as my past boyfriends were infatuated with it and it made me believe that that was the only and best way to show your love to your partner. Jake always affirms me and tells me that he loves me. We had a conversation earlier in our relationship about my libido (which is probably significantly higher than his) and he told me that when I try to initiate, he'll just ignore me if he's not in the mood, which didn't feel great to hear.
We've also had a few conversations about it where he's said that it's silly for me to think that his feelings will change whether we are or are not having s*x. He told me that he's happy that he doesn't have much of a libido, and I assume it's from his past trauma that makes him feel that way. I guess I'm just at a loss for how to feel emotionally about the whole situation. Any advice would be appreciated!
TLDR; I (21F) am about to be married to my fianc? (24M) and am concerned that he is completely physically uninterested in me.


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