here are some text message abbreviations for texting convenience

:

idk = i don’t know
ik = i know
thx = thanks
ikr = i know right
tbh = to be honest
pls = please
rly/rlly = really
tmr = tomorrow
np = no problem
prob = probably
ofc = of course
rn = right now
ty = thank you
btw = by the way
nvm = never mind
ppl = people
smth = something
ur = your
tho = though
w = with
bc/cus/cuz = because
wdym = what do you mean
gn/gm = good night/good morning
ily = i love you
ttyl = talk to you later

...and the list goes on.
these are the ones my friends and i use the most. hope this list is helpful!