Interest vs experience

I'm a 21 year old bisexual girl. I realized I was bi when I was about 18 because I noticed that I am attracted to other women. Usually with women it's more sexual then emotional (I tend to bond quickly with men on an emotional level) so I never ended up dating another woman. I'm also not very sexually promiscuous. I have kissed girls but I've never had sex with another woman. A lot of people tell me that I'm straight or that I'm not allowed to call myself bi until I've had real sexual experiences with other women. That I'm just curious. I don't think that I need to have experience to justify my interest in other women. Have any of you guys experienced anything like this? If so, how did you handle the situation?