In all seriousness, I do feel that almost anything can be forgiven. Of course it depends on the circumstance and how strong your friendship/relationship is. It's something that I've found tested lately, and I've found that I'm far more forgiving than I had realized.
Then again I very much agree with what TSQ
posted earlier. Love is always the appropriate reaction. This doesn't mean I don't get angry, because I do. But that's not what I hold on to.