Does she really like me?

Well, there is this girl and she hangs out with me but I dont think she really likes me. When I am around her I have to watch what I talk about. She will tell anyone everything you tell her. So I dont like to tell her anything I dont want everyone to know. I also feel like later she will talk behind my back about what I say. Like today she came and got me and I didnt call her and ask her. She is not a person I call and ask to hang out because I dont quite feel comfortable around her. But I didnt want to be mean and not go with her but every 5 minutes she was are you ready to go home now? When I got out of the car I felt like they were going to leave and talk about me for the rest of the day. I have had people come and tell me she talks behind my back.