Indecisive, NEED ADVICE!

Ok so I’m in a pickle. I have always been the “goody goody” and am known around my school for being nice, smart and a lil’ wild- a nice combo in my opinion. I never had anyone interested in me and now all at once all of these guys are, but they don’t want a relationship they just want to have sex me. I’m almost done with my junior year of high school and at this point in my life sex doesn’t mean that much to me. Even if I don’t go all the way with these guys my best friend told me I shouldn’t have sex because it will ruin my reputation, when I don’t think having sex would change my character/ how I’m perceived. I also feel really indecisive about what I want and wouldn’t mind experimenting with some guys in a safe/ healthy way but am I making a terrible decision? I also feel like as a woman I’m not allowed to be slightly promiscuous when men are praised for it. I know sex might mean something more to me as I find someone I really care about but will having sex now ruin what I have going for me?