Do you not inspire it? Or do you just not see that you inspire it because you're in the middle of having a conversation with him when it happens rather than watching him interact with someone else.
The more you post the more I believe that your past has done an absolute number on you and there's not a man on the planet who could make you believe that he actually loves you, because you don't really love yourself.
Look, I'll give you that maybe you're not his usual type physically, but as I said in a previous comment, neither is my DP. But that doesn't mean I find her less beautiful, or sexy than any other woman.
And you've identified some aspects of yourself that he definately loves, your intellect, your personality, but you act like they're worthless.
You said about your intellect -
"It's no more a reflection on me as a person that my height - which I also had no control over it's just a thing"
That's absolute bollocks. You've got far more control over that than you have over your looks. The fact that your knowledgeable, capable of holding an interesting debate on lots of interesting topics, they're all aspects of yourself that you've actively cultivated throughout your life. And they're surely the important bit.
Yeah, looks, or an Welsh accent are an attention grabber, but noone ever stayed with someone for their looks. (At least noone happy ever did). You stay with someone because they're someone you can see yourself spend the rest of my life with. Someone who interests you, someone who engages with you, someone who challenges you. Someone you're not going to get bored with. And it seems life he sees all of those things in you.
There's no such thing as a perfect match. Soulmates don't exist. You're never going to tick every single box for someone, and no-one is ever going to tick every single box for you.
There are probably any number of things I'd change about DP. I'd love her to be able to leave the house on time, to be a bit more interested in politics, to care less about her smile, or the size of her belly. But if that aspect of her changed, then what would I lose. What's the tradeoff? Because I've loved women who I could have a good debate about politics with, but we couldn't find a TV show we both liked, or didn't make me laugh, or I didn't make them laugh, or more importantly, we just couldn't live together.
I'm not saying you and your partner are right together. None of us can know whether thats true or not. I just don't think that you're looking at him with clear eyes right now, because you're attributing your own beliefs about yourself to him.