Does my guy friend mean anything by these things he says?

Anonymous
Ok so I have had a coworker turned guy friend for over a decade. When we worked together we always chatted, when we moved to different departments we kept in contact through emails text etc. Im thee only one he has a nickname for and would hug when we see each other. We are pretty close I would say. I have since left the company and he texts more often and past normal text times…. ok ok to get to the meat of it all he knows about my life and some of my family issues w/ my brother and he has said once “I feel like I know him, like he is long lost family”

And then another time he mentioned that my brother is coming to work at his department and he mentioned to me that it will be like a family reunion.

He tends to talk cryptically at times. Is he saying he sees me as a sister?
Does my guy friend mean anything by these things he says?
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