Girls, What’s the deal with this girl?

So cut a long story short I met a girl we were seeing each other we got intimate had sex etc everything was fine she then told me she didn’t feel the same way she didn’t want a relationship but before that she was talking about the future with me a lot, she had feelings for me etc. She didn’t feel the same I said ok n left her alone but she was following my every move on social media
We stopped talking for like a month and a half & i broke the no contact she messaged me happy birthday on snap n stupid me I decided to talk to her again cos I had feelings so I hit her up on whatsapp only to see that she had my number saved the whole time, she didn’t delete it
We started talking again & things were fine, then I got busy didn’t talk to her for like 3 days she got cold again
But I don’t know what the deal with her we don’t speak as friends & she’s quite guarded yet she can’t leave me alone or let go
When she sees other girls around me she gets upset n jealous but she’s talking to other men
I’ve been as genuine as I could with her but she will just never tell me what she feels or wants, every time I pull away she follows, she’s very responsive to my texts but doesn’t answer my calls

I haven’t told her I have feelings cos I’m sure that will scare her away and I don’t wanna be vulnerable tbh
I’ve known her for 10 months altogether & I started seeing her for about 2 months
its actually getting quite toxic,
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I even left my jacket at hers but she won’t let me go and collect it
Girls, What’s the deal with this girl?
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