Is my coworker jealous? Or just didn’t like talking to me in general?

I worked with this guy for almost a year and got really close to him. I asked him out a couple of times but he said he didn’t want to date coworkers. I recently quit and started seeing a new guy. Now the old coworker won’t return my messages. Another coworker asked if he had talked to me since I quit and he said ”not since she’s got that new boyfriend.” Is he jealous? Or just didn’t like talking to me in general?
Is my coworker jealous? Or just didn’t like talking to me in general?
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