What does that text actually mean?

The most-asked texts, decoded. Short answer first, then what to send back.

• "k"
  A lone "k" (especially "k." with a period) usually means she is annoyed, checked out, or ending the conversation on purpose.
• "I'm fine"
  "I'm fine" almost never means fine when it is short, ends with a period, or comes after a fight.
• "wyd"
  "wyd" (what you doing) is rarely about what you are doing.
• "do whatever you want"
  "Do whatever you want" means "I already told you what I want and you did not listen." It is a test, not permission.
• "nvm"
  "nvm" (nevermind) means she wanted to say something, then decided it was not worth the risk or effort right now.
• "lol ok"
  "lol ok" is polite-sounding sarcasm.
• "wow."
  A one-word "wow." after something you said means disappointed or hurt.
• "we need to talk"
  "We need to talk" means something has been on her mind for a while and she wants a real conversation.
• "u up?"
  A late-night "u up?" means he wants attention or company right now.
• "hey stranger"
  "Hey stranger" is a re-opener.
• "did you forget what today is?"
  If she asks this, the answer is yes, you forgot.
• "do you think my friend is pretty?"
  It is a loyalty test.
• "ur not like other girls"
  He is into you and trying to say you stand out.