Internet advice can only get you so far.

Being the best for that guy will be different for others.

But in general, communicate, never expect him to read your mind. Dropping hints and mind games generally end badly, guys are pretty much oblivious to that stuff. Men can begin to loath anniversary and birthdays because of shit like “I left the picture of the model wearing this sunhat on the fridge hopping you get me one, I didn’t want the ugly sundress!!!” just ask for the hat.

Appreciate him, and make sure he knows it. Seriously, saying thank you goes a long way. Even if something’s not exactly how you’d planned, if an effort was made, acknowledge it without the “but you should have…” or fixing it right after. Either show them the first time or the the next time, but never right after. Imagine struggling to fold sheets for an hour and immediately getting told they’re too bunched up or they don’t fit perfectly in the closet - you’ll never want to do them again.

Never go to bed angry at each other. Disagreements are natural, the key is both of you should feel like winners at the end of it. Sometimes you’ll get your way, and sometimes he’ll get his way, and that’s okay.

You’re two individuals, presumably attracted to each other as you are now, if you become “one person” that’s boring. Adapting to each others life style is expected, but you shouldn’t fundamentally change. Never lose who you are.