I actually had a friend in that situation, her boyfriend cheated but it was once and he really regretted it and then they lasted for ages and ages after that, and she never ever knew, and he was so good to her. I think Jack probably did the right thing in that case cos sometimes it's just a horrible one-off mistake.
i'm working on a lot of different things well right now i'm listening to bon iver and looking at cute dresses that won't fit me and sometimes writing but i mean
Aw poor Alex. :( Jack shouldn't have lied though, especially if he feels that guilty about it. Yeah, they probably would've fought or even broken up, but at least Jack wouldn't have spent the rest of there relationship feeling guilty.