There was a book I read but I can't remember the name of it; I think it was "Shattered" something.
It was about a girl who drained your life upon touching you. It was set in the future and there was a group controlling everything that wanted her to be a weapon, and she refused.
In the beginning she was in an asylum and they sent an undercover soldier to see how sane she was. He turned out to be someone from her childhood and her curse/gift didn't work on him and they fell in love and escaped.
It was a part of a series but that was the only one I read.