My friend and I are talking on Facebook and he said 「日本語かんぺき！今度会おうねアメリカで^_^ 」. Just curious, but would a response like 「うん！そうしよう！」make sense in Japanese?
Yeah that sounds perfectly fine. Repeating the verb back is also an appropriate response and sometimes sounds more natural.
Yeah. It sounds fine! I have nothing more to say.
Other ways of responding:
- そうだね、今度会おう！ Yeah, let's meet next time!
- そうする！ I will!