How can I know a lady as accepted me after being approached ?

On Dec 31st 2017, I walked up to meet a girl which I have feelings for, she gave me her contact that day, we do calleourselves very well, but she once told me that she is very young now to date any guy. How can I know she loves me and what can I tell her. She was once asked about me from some guy in the area that I was living before,