Acting vs. Reality--A Fine Line

I was talking with a friend the other day about how audiences fall in love with the actors in movies. For example, Jack from “The Titanic”—Leonardo DiCaprio has become a heartthrob for women of all ages. Then we started talking about how hard it must be for the actors to separate their life on screen (well, their character’s life) from their life in the real world. Hey, I sure wouldn’t be able to do it. I suppose that was the problem for Heath Ledger, as well as others, who weren’t able to perfect this ability. But really, how did Kate Winslet not fall in love with her costar in Titanic?? I mean, I guess it’s not real life, but when you’re passionately kissing some guy, even onstage, even if you’re “just acting”, it has to get pretty hard to separate the two worlds. I guess that’s just the skills that come with being a good actor. And for that matter, how do their wives and husbands (if applicable) feel about their husband/wife pretending to be in love with someone else every day? I sure as heck wouldn’t be okay with it—look what it did to Brad Pitt and Jennifer Aniston…but I won’t even get started on that one…