I recommend you read this book
https://www.amazon.com/Why-Couples-Fight-Step-Step/dp/0806540443/ref=nodl_
You may claim you don’t want an affair, but in some ways you are having an emotional affair right now. You need to determine what you want and be honest with yourself. Do not cheat on your husband or it will cause great deals of pain for everyone involved. Choose the marriage or don’t, but if you don’t then take the time as an adult to end it correctly.
I answered above but this is the US Amazon link if you don't see it.
Try this book
I suggest you read this book, that will let you know how normal you are : Come As You Are by Emily Nagowski.
And that you get HIM to read this book: Woman's Anatomy of Arousal by Sheri Winston, so that he can learn how normal you are, and ALSO so that he can gain an understanding of how women's parts actually work. It will help him realize that it's not just you, he may actually just be a truly selfish lover, who hasn't really pleased anyone before.
I know I've just told you, go read a book, but these two books will arm you with information that will be irrefutable and eye-opening. It's what you need. He's already just killing the messenger and invalidating your experience as woman when you try to tell him anything from your side.
The science and facts, have to do with both the structure of female erogenous zones and the conditions under which they work, ie how you can rub all the right things and do all the right moves, but if you are triggering a fight or flight response, even those won't work. It's useful for men to understand the science behind things, so they don't lay the blame for their own ineptitude, or lack of interest in trying, at their partner's feet.
Gardening would be outside my knowledge realm, but I know my late wife loved using a tool like this when she puttered about in her garden
If you have a big dog that likes to pull, you could help him work on that
Hmmm...
Some Jingle-Jangle Spurs?
Maybe go for something related to her work and get her some cool Medical Shears in many colors so she can match them to her scrubs each day...
After my Grandmother passed in October, I got one of these for my mom. I'd probably sit down and ask him all the questions.
https://www.amazon.com/My-Fathers-Life-Everything-Keepsakes/dp/0785839100
Look up Dr Jonice Webb, Running on Empty
This was a game changer for me personally. Hopefully your partner will read it too and take it to heart. Understanding what my communication style is and why was helpful. I still need a a lot of work but just knowing why you communicate the way you do will get tremendously. She’s on lots of Podcasts if you search the apple podcast app too, I’m guessing you can find those on Google play too. Good luck!
The following audio book may answer your question. It's about the 7 masculine archetypes that men should possess. Think of it as a blueprint of what it means to be a man. Karen Brody (the author) provides a brilliant explanation with incredible examples. Ignore the title of the book "Open Her" as it doesn't reflect the book at all. It is profound. I had some of the archetypes, but lacked in others. I highly recommend the audio book version as Karen Brody narrates the book exceedingly well.
https://www.amazon.com/Open-Her-Activate-Masculine-Powers/dp/B079C83K4F/ref=sr_1_1
Older book, maybe in your library, but it helped me sort out my head before I ultimately filed for divorce:
https://www.amazon.com/Good-Leave-Stay-Step-Step/dp/0452275350
I'm on my second and hopefully last marriage and have been married longer this time than the last time. I do like being married. To the right person.
This is the book. I hope it helps you as much as it did me. Best of luck!
I'm so glad it was helpful to you!
You might also want to check out the book, The Enabler: When helping hurts the ones you love.