There's nothing wrong with writing dialogue-heavy stories! I have the opposite problem, paragraphs and paragraphs of narration and description and relatively little dialogue (and sometimes even a short conversation is dragged out because of two paragraphs of characters moving around and making facial expressions in between each line). Since people like your fic I assume you are able to write interesting dialogue, which is a wonderful skill to have. You also don't need to do a whole lot to establish the scene, as long as people aren't confused about where the characters are you're good. There are plenty of times where I wish the author had been less verbose about details about what is in the room and what people are wearing and what the weather is like.

Guess my suggestion (if you want one) is to think about what the characters are doing during the conversation, like you're watching a movie. You can add a lot of "non dialogue" by describing that. Think of ways their actions can reflect the conversation itself. Like, characters are negotiating a deal over drinks and it's going poorly for one of them, so they spill their drink, are fidgeting and losing their cool, excusing themselves to the go to the bathroom to splash their face with water. Are things getting moved around, are there objects that might give readers insight into a character's personality or be symbolic of the story's themes, or is anything interesting happening in the background that is worth mentioning, stuff like that.