Guy ghosted me but now seems to be baiting me - pls help me understand his intentions?

Male coworker and I developed feelings. I later learned he had a girlfriend so I distanced myself. He seemed hurt and tried to reconnect. Even created a new project and got manager approval before he messaged me but I was cold and he stopped. Eventually, I messaged him about work to normalize things, after which he began initiating work chats almost daily for about a month. We became close and indirectly confessed feelings while remaining professional. I assumed he was single now because he was pursuing me strongly.

One day, it was announced he’ll be moving to another team. Before his move, he indirectly told me he saw us as a couple and asked if I felt reassured or still uncertain. I said things made sense. We exchanged numbers. He was leaving for vacation and created reason to work together later.

When he returned, he made sure I knew by replying on my work ticket. I messaged him on company chat asking how he was doing but he didn't reply (He had avoided similar personal question in the past). But, he became unusually active in my team chat. He posted things related to my interests, attended my team meeting and created/shared document on my favorite topic. I didn’t respond/react.

After few days, I texted on his phone “hey (his name)”. He didn't reply. I found his private social media and his sibling's public profile. During his vacation, his sibling visited him. There is a photo of him with his sibling and girlfriend. Although girlfriend is tagged, he didn't allow himself to be tagged and didn't like that photo, while liking other posts where he is there with only his sibling.

Its been 1.5 months and I don't intend to contact him. But his activity in my team chat has increased including non-work posts, like posting video of his view from the office, that seem out of character for him. He hints at me repeatedly. I've also noticed signs suggesting he checks my WhatsApp last seen and company login/logout times.

Please help me understand what his intention is.

Guy ghosted me but now seems to be baiting me - pls help me understand his intentions?
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