NBC (ended 2010)
|But when season 3 started, in one of the early episodes he mentioned about how his girlfriend was away or out of town and he was sick of being the 5th wheel to Sean/Elliot and Turk/Carla but then he just goes right back into being in love with Elliot again.|
This is probably long past the point anyone cares, but if someone finds themselves curious and thinking about it, in the final episode of Scrubs (the real scrubs, not MD), Jamie appears and states "You never called", probably to give fans a conclusion to her character. This suggests that they didn't really break up, but at one point they just drifted apart. Jamie said "call me", JD fell back in love with Elliot and ended up not calling her, and she didn't pursue the relationship because the drama was gone.
I think that is the best you are ever going to get from her and JD ending. Why it ended this way, I can't tell you, probably because it was too difficult to have ways to include her after resolving all of her personality quirks. Everyone else had something to continue to poke fun off, Virgin who was hesitant to go farther, drug addict, clumsy, crazy lead character(elliot), skanky (Dannie) and sister to Cox before that, pregnant with his child...Each other character was just easier to write, Jamie had no quirk, her husband was gone, she had no children, and the drama seeking behavior was resolved.