I am down for re5!

Hehe, no problem and thank you!

Welcome to Steam communities! ^^
"but if you are looking to play a game with someone is it okay to just write to them like this?" Yah, nothing wrong with that. :) Keep in mind people might not see the message until later since you need to accept the chat request first with people you aren't already friends with.
You can always write on people's profiles too!