to indulge in

• 沉迷在幻想里

  indulge in fantasy

• 沉迷于网络游戏

  be addicted to an online game

• 沉迷于各种不良嗜好

  be fixated on all the wrong sorts of hobbies

• 沉迷于声色犬马

  indulge in a life of vice

• 沉迷不醒

  be completely infatuated with