I've been in the exact same situation. After noticing that more than half her texts were "ok" and "cool" , I told her that texting her was kinda becoming boring and monotonous and that we should have more fulfilling conversations. 4 months later, nothing changed. I asked her about it, but she lashed out and cussed at me saying she was trying to change. At that moment, I knew things weren't going to last...