People who are writing things like 'She has a life outside her phone' 'she's been busy' etc are talking NONSENSE. Girls are GLUED TO THEIR PHONE! When was the last time you looked around on the street, on the bus, on the train and saw a girl that wasn't looking directly at their phone the whole time. In my opinion girls are ignorant, completely ignorant and then they have people come out with the 'busy' excuse for them. Trust me, no girl in this day and age has not checked her phone, her texts, her Facebook, her Instagram etc etc for hours, it's just impossible, girls are stuck to their phone and their social networking day and night, so if she hasn't replied after 3 hours max you can safely assume she has ignored the message. They are NEVER too busy to reply.