Is she the side chick for her to keep acting crazy?

She seems to keep an eye on the girl the guy is interested in. She just lurks but never said anything to the other girl. She frequently reposts content that references his personality, looks, and favorite shows. He mentions to be in similar the girl is at. They used to follow each other on Instagram, but he has since unfollowed her. Additionally, she has posted on social media about having a boyfriend, yet she never reveals his identity.

Is she the side chick for her to keep acting crazy?
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