Jessica Biel is standing by her man! According to insiders, the Accidental Love actress, 42, has been staying loyal to her husband, Justin Timberlake, and doesn’t plan on giving up on their marriage following his shocking DWI arrest. “She’s not going to leave him,” a source claimed. “Jessica is still very upset by Justin’s recent actions, but she has agreed to work through it.” Despite vowing to weather the storm with the former boy bander, 43, Biel has continued to voice concern over Timberlake. “Jessica is worried about him,” the insider admitted, “but Justin has promised her he will make th…