How to export text messages to my computer?

[iMore Question]

I have a ton of text messages on my phone, and am running out of space. There's one convo in particular, with my girlfriend, that I want to export. Everything seems like you have to pay to be able to unlock that feature. Is there any way to do it free?

 

[Just_Me_D]

Can you not take a screenshot of the one particular conversation and then mail it to yourself?