My sister been giving her boyfriend of 4 1/2 years the silent treatment, because he's been cheating with another girl for like 8 months, he say's its nothing and he don't have feelings for the sideline, then told my sister how he really wants to marry her. I told my sister thats bullcrap and she should just walk away, and thats what she did. But now I wonder will it effect him or is it just plain childish of her.They say you don't know what you have until it's gone. But dude's never show there feelings do you think he'll come crawling back.Because so far he's being playing a good game.