People in general tend to be click or don't click, but that only get's magnified on sites like the Guild.

You can normally tell really early if you two will get along or not, if not the RP isn't going to last long.

It's also in the nature of RP's to randomly die, this can happen for a number of reasons. Such as lack of interest, people don't click, RL caught up, forgetful etc. I'd contact the other person first and see what's up. Either they don't answer and you can consider the RP dead, or they do answer and you either know why it ended or can get it going again.