Maybe for some people it’s easy to fall in love and express what was on … but some feel it could fall in love but not enough to have the guts and conviction to say what they feel ..? fear when a loved one is not love him … I think it’s the main reason why someone harbored feelings! , Although it could be ascertained if it is not to say it could be limited only to love but not loved and could not have. and feel hurt if he loves happy with someone else .. but it was not the only reason someone harbored feelings … there are scared because he felt he was not able to please or satisfy the demands of their beloved ones ..!