Tiffany had actually been incredibly helpful. But Kurt had also realized specifically because of her. The effect wasn't just one way. Since Kurt had close relationships with most of the others the difference was less for them. When it was happening he had convinced himself it was because he was happy that they were so happy, or maybe that was it.
Kurt had a deep connection to all of his angels, which he didn't understand. It was significantly weaker on him than on them, but it was still there. He did love Sara a bit more than before, all of them.
The difference was just more noticeable with Tiffany whom he barely knew. In fact, he had called her because he had wanted to see her, the one angel he hadn't officially met as an angel. Mary could have answered all of these questions. He convinced himself that Mary was Layla's angel, but they were all both of theirs.
He had missed Tiffany, someone he barely knew.
