Keratzlaff said:
Ok that does make sense!! what about Facebook messages, did you do the same? only send a few?
I'd just do a few; spread them evenly over the total time you spent talking on Facebook. If you've been talking on Facebook for a couple of months, or even years, pick some examples from each month and send them. If you've been talking on Facebook for a year, for example, sending 12 extracts, one from each month, proves how long you've been talking to your partner on it without bogging down the application unnecessarily.
That's what I did anyway, you can send them your entire chat history if you'd like, but if it's long it's likely to increase the time they have to look at your application!