To a generation of viewers, Jonathan Bennett will forever be known as Aaron Samuels, the dreamy jock who won the heart of Lindsay Lohan’s character in the 2004 teen comedy classic “Mean Girls.”The actor, who is gay, has more recently been finding creative ways to reflect his lived experience through his work. This fall, he’s one of the principal stars of Hallmark’s “The Groomsmen” trilogy, in which he portrays Danny, a gay athlete who supports his two straight friends (Tyler Hynes and B.J. Britt) as they prepare for their respective weddings ― while holding out hope for a fairy-tale ending of his own. In the series’ second installment, “The Groomsmen: Second Chances,” Danny grapples with a “My Best Friend’s Wedding”-like conundrum when he’s asked to be the best man for a longtime pal, Zack (Alexander Lincoln), who is preparing to tie the knot in Greece. What Zack doesn’t know, however, is that Danny has been suppressing his own feelings for him.