Why the reluctance to say goodbye? Do you think he likes me?

I drove past an old coworker today and waved at him. It took him a second to realize it was me, but he waved back. So after he got off of work, he visited me at my job. I wasn’t off yet, but he followed me around as I did my last tasks for the day. For one of the tasks I had to go to another room. The door had a window and he just watched me from the window. For the last task, he just stood behind me and watched me as I completed it. After I got off, we hung out with a few other coworkers, but they left soon after. Then it was just him and I. We talked a little longer. He said goodbye, but then continued to talk to me. Then he said goodbye again and hugged me tight.

Why the reluctance to say goodbye? Do you think he likes me?
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