How many guys does a girl have to sleep with inorder to be called a ?

Ok so I have feelings for this girl. She claims to be a Christian girl with morals and everything yet she has slept with 6 guys in the past 2 years. I lost my virginity 4 years ago and she got mad at me for having so early yet she has slept with more people than I have. But despite all this i still like her and stuff because she is just a fun person to be around. My heart says to make a move buy my brain says that she a little promiscuous. Like she is 17 and she slept a 25 year old a few times and 21 year old a few times. Last night she had with some guy. And im just like wtf you says that you don't like it when guys use you for your body yet your constantly giving it up. So is she a little sluty? Keep in mind we are both 17. And should i just move on? Like i like but I want more than that i just don't sleep with just anyone. But yea should I move on? Thanks in advance for your help.