Quote:
"sorry I'm so delayed at responding, I just sucked at texting for a little bit."
Next time you send her an sms and she replies much later with that kind of excuse you can do two things :
-if you don't want to show her you are jalouse and want remain a cool guy, respond with something funny that suggests rapport. In that kind of style "why don't you take an appointement with me and i shall teach you how to improve this ?". (You can think of your own thing, it's just a quick example).
-or if you are feed up with lame excuses... just forget about her, cut the deal with a sms suggesting somehow "you should improve this, can't waste time waiting for your excuses without a proper honest answer in it ..." (Again it may be a bit too harshe but you can think of your own things).
Choose your option,
Good luck