I think Suzuka and Arima did start getting along pretty well in America. They were starting to be around eachother even before they left to America. You don't even know how many people she knew before or while she was there. Arima was a person she knew, and you usually talk to people you know before you go talk to new people.
Arima started liking her and about 3/4 way through the trip and asked her out. She said that she still liked Yamato, and turned him down.
I think this because of the short conversation that Arima and Yamato had when he visited Toudai and Arima said something along the lines of why Yamato wasn't going to go to Seijou.
Bullet Tooth Tony: You should never underestimate the predictability of stupidity.
Reporter on Titan Maximum: Sasha is there any connection between your poor album sales and the fact that it sucked?