You shouldn't let some guy come between you and your sister. Tell her how it is, that you have no interest in him, but if you do...that's a different problem in itself. Tell him that you would like to stay friends with him, but explain to him how important your sisterhood is. As for fraternity brothers...they will love you all the same, we are all growing older, and conflict is a big part in life, getting through conflict is an even bigger part of life.
....Urm...but that's just my two pennies on the dolla!
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