"Because it would make me start to question things," she answered, hands twisting together. She looked up to him, trying to phrase everything correctly. To not mis-speak. Because if she did that, he might not give her the chance to correct herself.
"When you first came to Mystic Falls, I told you I wasn't Katherine." They'd been in the high school parking lot and he'd tried to kiss her. "I didn't want to be the girl that you and Stefan fought over." Katherine may have reveled in it. Elena did not.
"I didn't want to give myself the chance to love you." To cause more friction between the brothers. "....but I do."