Could he obsessed with his cousin baby mother?

My boyfriend added his cousin baby mother on facebook 2 days ago. (But she never did accept it. ) He told her that he was with me and that he wanted to see her. She replied, "I have a kid with your cousin". He ignored what she said And STILL asked to see her. what is his problem? Could he be obsessed With her? She clearly told him she doesn't think about him and he brushed it off. He even video chatted her but she didn't answer it. I was sitting right next to him when he called her. He said he was tired of me. Smh I messaged her and i guess she told him to block her because we were being childish putting her in drama. Smh.
Could he obsessed with his cousin baby mother?
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