Here's what we know:
* They break up in "Night at Lazerama." Juliet decides to move to New York to pursue her acting career, and Justin chooses to stay in Waverly Place.
* The show never explicitly shows them getting back together. Although they both seem sad about the breakup, the show focuses on other storylines and doesn't revisit their relationship.
* There are hints they might stay connected. In later episodes, Justin mentions being in contact with Juliet and even brings her up during conversations.
It's ultimately up to each viewer to decide what they believe happened to Justin and Juliet after their breakup. The show leaves their future open to interpretation, suggesting the possibility of a reconciliation but never explicitly confirming it.