I'm sure others have noticed and some may have not but when it comes to Barbara Gordon aka Batgirl aka Oracle...writers across various mediums have had this desire to have her date half of the Batfamily and it's something that needs to stop. Why do you think writers like to use her as the de-facto female to date various Batfamily men?

In the comics she's been romantic with Nightwing, Red Hood, Batwing

In animation she dated Dick and Bruce

In the Arkham games she is engaged to Tim Drake.

3 Robins, Batman himself, and Batwing. Having multiple love interests across ones history is fine but it's something different when they are part of the same general crime fighting family.