Why she feels insecure around me?

I don't judge people i honestly could careless. But my close friend who is jealous of my other women friends told me. I make her insecure. For some reason she think i always talk about her.

I joke around with everyonr. But since i know we have an emotional bond i trend lightly on joking because she's sensitive and take things i do or say personal. I been knowing her for a long time. But this past year we got closer and known each other better and she said i make her feel insecure.

Why do i all of a sudden make her feel insecure?

Every time she hear me laughing with another woman she go into defense mode. She accused me of talking about her behind her back. But never had proof like she's fishing for it. But it seems like when she have my full attention she's happy and good to go with no problems. But i still make her feel insecure. I tried asking her but she's not giving me an answer.

How could i make her feel insecure? It caught me off guard.
Why she feels insecure around me?
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