"Part Time-Lover" was a huge hit for the great Stevie Wonder.  Truth be told, if you're going to talk about 1980s pop songs with the word "lover" in the title, I prefer "Easy Lover" from Phil Collins and Philip Bailey (from Earth, Wind, and Fire; he also happened to sing backup on "Part-Time Lover").  Stevie Wonder didn't create this cocktail.  Instead, the Part-Time Lover is a creation from Jon Weimorts in Los Angeles.

1.5 ounces blanco tequila
.5 ounces Aperol
.5 ounces elderflower liqueur or super simple syrup
Juice from 1/2 lemon
2 dashes Angostura bitters

Combine in a shaker with ice, shake with the passion of a (you can figure out the metaphor, right?), and strain into a chilled glass.  Lemon garnish optional.

Just as the catchy upbeat vibe of the song belies its sad substance, the smooth taste of the Part-Time Lover belies its strength.  The tequila provides the subtle kick beneath the bitterwsweet Aperol (a lighter, less potent amaro with an orange taste) and the sweeter elderflower liqueur, e.g. St. Germain (a key ingredient in the Flower of Normandy), or super simple syrup. Weimorts uses elderflower liqueur because it adds more flavor to the Part-Time Lover.  If you don't have or want to get that, super simple syrup does quite well.

Have a full-time fun cocktail and drink a Part-Time Lover.