How to handle jealous 15 year old niece?

What do you do when your teen niece shows she is jealous of you? I catch her staring at me and cutting her eyes at me (mind you I’ve very nice to her) I spoil her with gifts and Starbucks and fast food. She’s not doing well in school and I still try to be nice. I’m getting tired of dealing with her. Her mouth is smart all the time. I get she’s a teenager but some of this doesn’t feel normal. She acts like a jealous girl at a night club. What can I do to change this behavior? Mind you her mother acts just like her to me! I’m shocked a teen is behaving this way to an adult. I try to compliment her and boost her self esteem but to no avail she’s acting jealous of me. It kind of creeps me out. Anyone been through this with a niece? What can I do to change this?

How to handle jealous 15 year old niece?
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