Girl's Behavior

Should I test her by saying this?

So I live with a close friend and lately she’s been kind of nosy. I just started dating this new guy and I’m head over heels. He feels the same way. Let me just say I’m an open book. It’s really bad because she barely asked to hangout before me and him met and I always had to. Now that I have him, I told her how we facetime and stuff and now all of a sudden she wants to hangout afterwards and I know she just wants to get my buisness from me. She has a boyfriend of her own who’s she been with eight months but met him on tinder. I met my guy at work. She tells all my buisness. Like the other day her parents came down and she voluntarily told her mom i was seeing someone and how he was gonna take me on a date and had his outfit picked out. I’m picking up on her game and it seems like she is waiting for me and him to fail or is jealous or something. She even told me to update her on our FaceTime call which is really weird. I’m thinking about messing with her tomorrow and saying that I’m gonna take a study break and go ft him. Then see what she says. I keep turning down hanging out with her which means I’m not telling her anything and I know it’s driving her crazy. She did that with my ex and I’m pretty sure she had a crush on him. She’s so obsessive over my guy who she’s never even seen and it’s a little weird. Is this a good idea to tell her tomorrow? If not that what should I say? I want to test her.
Should I test her by saying this?
Post Opinion