what can i do my 14 year old trying to meet up with 17 year old boy?

[galacticwarrior]

my 14 year old girl has been bbm'ing a 17 year old boy whom she never met or knows for 2-3 months she dont want me to tell anyone since i found out and now i have found out that they are trying to meet should i say something to her mum cause she promised to stop speaking to him if i didnt tell her mum but she has carried on so should i tell her mum i have found out who the boy is and spoke to him but he not bothered and if i try to talk to my daughter she starts to cry and tells me not to tell her mum and that she has removed him from bbm but then they start bbm each other again and when i ask for her phone she snaps at me i am at my wits end as they never went to the same school so are complete strangers to each other should i let it go or should i say something

[WillerBee]

Ahem,

I...I...I'm sorry. I'll refrain from messaging her...

~Sir Willer Bee III