Fittingly enough, “Three Months” is a movie about waiting, and while 12 weeks may seem like an eternity to its openly gay lead character, Caleb (Australian pop star Troye Sivan), it’s nothing compared to the decades others have spent waiting for a project like this to come along. Here, readily available to anyone with a Paramount Plus subscription, is a frank, affirmational portrait of a contemporary queer teenager. Writer-director Jared Frieder’s feature debut feels like the LGBT equivalent of “Juno”: snappy and refreshingly nonjudgmental in dealing with the consequences of a risky one-night stand.
In 2011, when the movie is set, it takes three months for an antibody test to conclusively determine whether someone who may have been exposed to HIV was in fact infected. That’s a simple rule-of-the-road for sexually active gay men, but one rarely discussed in…