Competitive ex?

My ex seems to be eithe being competitive or copying me online. I still love her, she rejected me. She's talking to a new guy.
when I post something for my business she posts shortly after in a very similar way. Or if I mention I gained new work, she will gain more work too... she puts pics up still wearing clothes I bought her.
she stopped talking to me when new guy came. Then out of blue tags me in a post she seen about something I am connected with. When I thank her she doesn't reply. I've stopped all communication with her, up until this new guy came she messaged me and send me links to work.
Why is she doing this or am I looking st things too much?
Competitive ex?
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