I know you can crave companionship and sex and love so badly that it physically hurts. Real love means seeing beyond the words spoken out of pain, and instead seeing a person's soul. Forget about any texting and calling rules.
And if anyone is going through something similar right now just know it will get better. How much should you say? The longer they hang onto a lost cause the more unstable they look to everyone else. If this date goes well, there will be lots more opportunities to share your stories in the future. The sooner you tell her what a great time you had, the better.