So far my ideas were: started, mused
The context: [[The narrator, born and raised in the States, is visiting her family in a foreign country for the first time. She and her cousin are at a shopping mall.]]
In the middle of my explanation of dating norms in the States, he tsked at me and asked, “Why you walk so fast?"
“Don’t tell me you're too tired to keep up, now!” was my playful reply, but I paused. Why indeed? I explained hesitantly, “I guess this is how fast I normally walk. We have seven minutes between classes at my school, and it's a big building.”