Adam, you have been told on many occasions that it matters not one iota whether you or we think Jeremy jilted Julie. What matters is, did Julie FEEL herself jilted by Jeremy. As for how you believe he did it, there is more than one way to skin a rabbit and perhaps Jeremy preferred the softly softly approach.
Looking at it on from the outside. It is inconclusive whether Jeremy jilted Julie.
Jeremy was keen for Julie to attend WHF on the massacre day. Julie was reluctant to attend the funeral or spend too much time with Brett. But was persuaded to by Jeremy.
Reading Julies WS it does not seem she was too bothered. After finding out of Jeremys involvement. It was probably a relief, confideing to friends & then the police.
If Julie has only said these things (& they are lies) because she felt she was jilted, she must be one crazy, vindictive & confident woman.
However there is still the slim possibility she has only said these things because she felt she was badly jilted. But they are still true. A woman scorned....