By Breaking Celebrity News Staff

The girl who was dating the convicted Petit family triple murderer at the time of the killings has revealed how his behavior dramatically changed in the weeks before the brutal slayings.

"The first time I met him he was still in jail for burglary," Caroline Mesel exclusively told Breaking Celebrity News. "My sister was friends with Josh and she wanted someone to go with her to visit him."

While he seemed normal at the time, after being dragged into Joshua Komisarjevsky's dark world Mesel now says she wishes she had never met him.

"If I’d known this was going to happen I’d have told her to go on her own," she said.

"We were talking for a while and then we started dating after a couple of months. For me it was serious, I thought for him it was serious too. I thought I was in love," revealed Caroline, who was still in high school when she fell for the older, troubled guy.

Once Komisarjevsy had been released from prison to a halfway house, the young couple's dates were still restricted because of security