Ok Puffin, what you need to do, is what i call "test the water", stick you toe in, and see what it feels like.... Ehem... Firstly, you could just try and get into a chat about the general and wonderful topic of Homosexuality, and note her responces. THEN if all is well, tell her that u think you might be a bisensual/bisexy curious, AND THEN if she takes that well, confess your undying love for all those with bits the same as you! If she is your "best friend" then it shouldnt matter, and u shud skip all my steps and get right to the final one. Good Luck Bunkins!