INTERNET DESTROYS ANOTHER KID'S MIND.

THIS IS MY GRANDSON THAT I GAVE UP MY LIFE TO RAISE. HE USED TO BE A REALLY GREAT GUY UNTIL HE GOT A CELL PHONE WHEN HER TURNED 18 AND MET SOME 15 YEAR OLD GIRL ONLINE THAT HE IS TRYING TO IMPRESS. WHAT KIND OF PARENTS RAISE A GIRL WHO THINKS THIS BEHAVIOR ID COOL ?
KEEP IN MIND HE IS 18 AND PERFECTLY HEALTHY. I AM A 64 YEAR CRIPPLE WITH BOTH ADVANCED LUNG AND ADVANCED HEART DISEASE.