Oh, no. You got in this situation, well you're done. If a girl responds to a text with "k.", you're not on good terms with them. It's generally a message sent to express to you that they are mad.
Snapchat-
Carl: Hey, beautiful.
Jessica: Hey, thanks! :)
Carl: I'm sorry typo! lol i meant hey you piece of scumbag, hehe.
Jessica: k.