How to know if a CANCER is interested in you?!?

So I am a scorpio girl and this cancer chick always texts me! (yeah im gay so is she) ANYWAY Even when she is drunk she will text me and hit on me and tell me all these nice things. But she doesn't do it when shes sober! I would just like to know some signs that a cancer is interested in you and how to KEEP them interested in you as in how to not bore them or scare them away??? Any thoughts? Ps. I am a Scorpio with Cancer rising! With a Libra moon! thanks!