Falling in love can be brilliant...or dreadful, depending on the context. If you have fallen in love with a girl who doesn't feel the same, whatever the reason, you'll need to overcome these feelings to move on with your life. To get over a girl you love, you'll need to put as much space between the two of you as possible; when you do interact, try to do so only in public spaces and stay away from personal topics or planned activities if you have to be alone together. Thinking objectively about the situation and taking steps toward a better future should also help heal your wounds.