English slang
Ttyl = Talk to you later
Hbu = how about you?
Gn

= Goodnight
Gm = goodmorning
Istg = I swear to god/gosh
Ily = I love you
Srsly = seriously
Ilty = I love you too
BFF = best friends forever
Bf = boyfriend
Gf = Gf
Nm = not much
Omg = oh my gosh