Lesbians or bisexuals please click

Sooo im 16 and im just wondering how do you know if your interested in girls? I consider myself straight but i find myself more attracted to girls. So far ive found myself wanting to be with 3 of my close friends. I even had one friend that i lost touch with and even still i was thinking about her so i reached out to her and we hang out but i find myself being overprotective and jelous. But with guys ill find a guy attractive but if a guy tries to talk to me ill instantly reject them . Sooooo any advise