I read this sci-fi/apocalyptic novel when I was in my early teen years. The main character was a female and there were several others and it's like they woke up or found themselves abandoned in an old school or something. I believe there was some kind of war going on or maybe they were trapped in a different time or dimension.
What I remember the most is this female falls in love with a guy she meets and they have this instant electric connection when they look at each other or when their hands touch. This connection reminds her about of a previous experience in her life. They end up kissing, and she feels this electric wave and these flashbacks.
I know this sounds completely crazy. I am now in my mid-thirties and I am just trying to figure out what this book was. I do not believe it was a series because if it had been I would have read the whole series.