Andrew did not say anything, he just resumed what he was doing before he called Rachael.
When he finished his meeting, Ben gave him Rachael's message. Later when he checked his phone, he saw her text message. Contemplating for a while, he called her back.
Andrew knew she was upset because of how he had been behaving since yesterday. He felt bad about it too but he couldn't help it.
He knew her past shouldn't bother him but when she told him she was going to meet Oliver, he didn't like it. He was mad and very upset.
He didn't wanna be so petty but he had no control over his emotions and how he was feeling. This made him feel very helpless.
Since his mood was evidently not nice, he was maintaining his distance until he managed to calm himself down. Lashing out on her was the last thing he wanted to do.
