I think this is a reference to the popular meme "Y U No", which essentially means "why do you never" or "why don't you" - an example could be "Y U no listen?" which simply means why don't you listen.
Or it could be something completely different. Text language changes so fast.
Study Sleep Talking Unlimited texting Dreaming Yawning
FR in texting means "for real" as an exclamation.
ths stands 4 this in texting
imf
Yyp
Call Me
yr might be an abbreviation for year. "He's 8 yrs old."yr might be cellphone texting short forms for* your: Cellphone text msg: Where's yrhouse?* Why are: Y R U texting me?
Hurry Back
Yes please
Face Time
BTR
haven't had sex