cant tell if srs..
but given your age difference it will be like dating a toddler.. 22 year old girls are still in a party faze and you being 31.. not so much
does this girl actually have interest in you, she just lonely or did you read too far into a joke..
what do you want? a bang.. or something serious
pics of said girl
my advice would be to continue on your way for everyone's best interest.. but thats me