Courtney Whitmore / Stargirl

Post-Crisis / New Earth
Early on, Courtney hinted at having a crush on Tim Drake / Robin, but this was never followed through upon.
 * 1)  Billy Batson/ Captain Marvel  -  After his JSA teammate discovers his identity, and that they are both sixteen years old, she and Billy begin to date. (JSA #48, Jul. 2003). The relationship becomes apparent to other JSA members, who don’t know Billy’s identity and see it as a perverse relationship between an adult man and a teenager. Billy wants to reveal his identity to his teammates, but is prevented from doing so by the wisdom of Solomon, and his relationship with Courtney ends.
 * 2)  Albert Rothstein / Atom Smasher  - A glimpse into the future showed these two married. While teammates int he JSA, they have shown feelings for each other.

Arrowverse

 * 1)  King Arthur  - In this version, Courtney was a member of the JSA in the 1940s. The team was later scattered to different time eras, and Courtney became a member of King Arthur’s court. She fell in love with King Arthur, but had to accept the fact that he was married to Guinevere (a political marriage, and Guinevere was into girls anyway, but there you have it)