Crush got jealous because I talked to another guy?

There’s this guy I have a crush on and I’m pretty sure he has a crush on me too, but he gives somewhat mixed signals. He’s a good guy, Christian, but today when a guy kept asking me about my career I think he got jealous because usually we hug and say bye before we leave but today he left without saying bye to me at all. What should I do?
Crush got jealous because I talked to another guy?
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