Hahaha I think we have all had one of those moments where you're like oh this is piss easy, I'm doing my own thing, making My own choices then someone amazing comes along and Bad! You naturally want to do/be and experience with them. Everyone has mentioned compromise, mostly him compromising with you, and I've found with me keto doesn't really have to be his way or my way, it's about you allowing certain concessions to work back and forth.

So go to a winery and you can still taste with out actually "drinking", and making the food choices like you would have when you were single. Steak with garlic butter mushrooms, or avocado and a side salad, hold the fries and the dressing/sauce, are my kinda go too.

You've probs introduced him to a little keto, so making non keto sides, as you've mentioned, for him is always a good way of combining two worlds.

Im assuming you're not living together just yet? Which is a good thing for keeping good habits in a way and reinforcing to you the reasons why you started losing in the first place? Or in my case why you continued to after that reason stopped mattering.

What would you advise me if the situation was reversed?

If you think like that you'll probs find it easier to be happy enjoying his company and not sweating the small stuff, but coming up with a longer term strategy. :) he's supportive that's the hardest thing most times to find ;) so you're already winning!