Thanks for everything, if you ever need a favor in return, just let me know.
感谢你所做的一切,如果你需要我帮忙的话,尽管开口吧。
You don't keep your word. Why didn't you tell me then? I've been looking forward to it. How can you change your mind at last minute?
你不守信用。为什么那时不告诉我呢?我一直都盼望着它呢。你怎么能在最后时刻改变主意呢?