Jessie is a friend, yeah, I know he's been a good friend of mine
But lately something's changed that ain't hard to define
Jessie's got himself a girl and I want to make her mine

Jessie's Girl played on TheRiches at the HS reunion of the opening scene. Class of 1981. and Joe says yes, that song was 1981. Rick Springfield.
I love it, hearing it on the show made me happy, like dancing, takes *me* back to 1992 or so.

and I also think of:
My Best Friend's Girlfriend ...but she used to be mine!
which Joe says is The Cars, around the same time.

and, more distantly but also related:
...My Baby was the Centerfold!
which Joe says and I remember, right, is the J Giles Band