Lost_man and pcmaster do have a point so take that into consideration of how your approaching the situation. What the nurses have said in this thread is also correct, they are very busy but then again if they are interested they will find time to text back. Just let this one go, if you feel like texting her then change the whole situation by pretending to be a nurse yourself and relate to her. That way the conversation can let her express herself but do not take it seriously. She called you needy, thats usually something where you should say "whatever and goodbye" and find someone else who is more fun
What you want sometimes may be your brain only seeking the comfort and satisfaction. But what you really want to do with your gut feeling, instinct and heart is reality.