His friend said; well you didn't do it did you?

It could have been a joke!!
or it could have been out of context
or it could have been important

I have this complex where I cant just
leave such a thing alone...(maybe its like
a vigilante complex or something)

It's past tense (we're not talking about suicide, we're talking about self harm I believe). Julia admits she didn't know the context, didn't hear/understand what it was and knows herself to have a "complex" about telling. That's Julia's problem, not the boys, whatever they were talking about? Julia has to decide if she wants to work on her problems she perceives or wants to keep feeling "misunderstood". The other people aren't going to stop feeling like she's butting in? All Julia can work with is Julia, not the boys, their mothers or anyone else.