What to do.

(For context: I'm a 16 year old girl) I think I'm bisexual but I want to be sure. It's been a year since I started thinking I was bi but I'm afraid to tell anyone. I also hear girls say they dont want to be a experiment witch I totaly get but then I her people saying to experiment in order to figure things out and I'm not sure what to do. I dont want to hurt anyone's feeling if I'm not bi. I have had crushes on girls but I never let anyone know and, again, I dont want to hurt anyone if I wind up not truly being bi. Sorry about the grammar and spelling mistakes.