Is my friend toxic?

Ok so i feel like my friend talks bad about me behind my back. I have a friend who is kind of close to me. But i guess she is starting to become toxic. She gets jealous of little nice things that happen with me. I overheard her saying "[my name] overreacts".

She doesn't even looks that interested in talking to me and most of the time tries her best to leave quickly by making excuses.
I don't know what to do. Should i just stay quiet and accept her like that?
Is my friend toxic?
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