Love is love and marriage is marriage. If you are just in love and your brother happens to be just like you, there is nothing wrong with that. Although in some ways, it is not very good. But love or something is a matter of two people, and I don't think others are qualified to tell me what to do. If you are really sure of your mood, it is ok to fall in love with your brother. Just, really make sure what you and your brother think. If this is really love, then don't hesitate to fall in love, girl! Good luck ~ No matter what happens in the end, this is your emotional wealth and valuable experience. If you miss it, you may regret it, so follow your own heart and consult other people's opinions.