Was he interested in me or the other girl?

Was with a guy (agent) today looking at a property. We ran into his coworker/another agent and after we left, he asked me how old I thought she was. I said mid to late 20s and he's like "she's 21, maybe just turned 22 but she looks a lot older right?" I was wondering why he was asking that but then he went on to talk about how she joined the company etc.

So....does that mean he likes her? Why would he ask how old I thought she was?

He asked me if I'm into astrology. Apparently he's into it.

I'm confused. Was he interested in me or the other girl? Or was he just having normal convo? He looks around my age.