Is this rejection or is he not interested?

There’s this guy at my job who did start to secretly like. He had been a bit playful with me and always did something funny when I passed. Then he like suddenly started avoiding me. I was so hurt..

But today we were both in the break room together and he was on the phone with a girl ig. He sat at a table next to me but it was across.. They were talking etc and he said he would call later. He did call her bro a lot so I was confused

Whats interesting is when he got off the phone he told me that he was talking to his best friend and she is also hi ex girlfriend. He said that they had been together in high school. He told me that she was prob going to be his wife..

Is this rejection or is he not interested?
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