I am a super-introvert, and my husband definitely is not. Not that he’s an extrovert—that actually might have been easier to adapt to since he would have had a broader social circle to run around with and would have depended on me less for social stimulation. But he’s sorta in the middle of introversion and extroversion which means that he prefers to spend most of his time with one or two of his favorite people. And that almost always includes me.
So, spending time together gives him social energy, while mine becomes depleted (as is the case with all of my social interactions).