Am I in love with her?

Hi I'm a girl so like I have a close friend and she has a relationship with also this girl as in girlfriends, and I think her gf isn't serious abt her, I mean she led on a guy and this is her gf's first girl and girl relationship and I think she's just experimenting with her, but they've been together for longish about a couple years, I only got to know this close friend recently like 2 years ago we were just colleagues before, but now we've gotten closer and I don't know what to feel, I just care about her, do I just care about her or do I love or at least am interested in her??