* Real go through 3-2 on aggregate * Reus scores twice for 2-0 win * Di Maria has early penalty saved (Updates with more quotes, details) DORTMUND, Germany, April 8 (Reuters) - Lacklustre Real Madrid edged past dazzling Borussia Dortmund 3-2 on aggregate after a 2-0 defeat on Tuesday to advance to the Champions League semi-finals and stay on track for their tenth European Cup. Two first half goals by Marco Reus, both coming from Real mistakes, gave Dortmund a deserved lead as the Spaniards, who had a penalty saved in the 17th minute, were left mesmerised by the Germans' frantic pace on a rainy evening in the Ruhr valley. Real, with top scorer Cristiano Ronaldo left on the bench due a minor knee injury, saw their 3-0 advantage from the first leg in Madrid almost evaporate in a disastrous first half for them. "That was too much suffering and I think it was deserved," said Real keeper Iker Casillas. More...