well this is a serious case and for real it happens with lot of people. i also went through the same situation once. well tell your friend not to be a loser and dont just let it go. if she fears that means there is still some space between them that needs to be filled up . believe once the girl truly trusts the guy and believes there is no other that can love him as much as he does she will have no option coz girls crave for attention and love but at the same time they dislike easy going fools those henpecked husbands types, and they also dislike too much ego. so he's gotta keep a good balance between all of these.and even after that, if she want to go let her go but remember she will come back. and ya forgivness always built trust among ppl in a relationship.This will work 100% trust me.