I'm a 15-year-old girl and for three years I've been completely in love with my best friend, who's female. We've been best friends since we were six and we have a really, really close bond, we're absolutely inseparable. A couple of my friends have told me we'd make a really good couple, but I'm not sure if they're joking or serious. I haven't told anyone how I feel about her, but it's getting hard to hold it in. I don't know what to do.