Is my old crush jealous?

A group of friends sitting together just talking having a good time, my old crush sitting across from me, this guy sitting right next to me, I said something funny and he was sitting next to me grabbed my shoulders and laughed, while this happen my old crush turned his head away from us every few seconds looking at me and this guy with his arms folded. When I tried to leave the group later on old crush did not want me to leave.
Is my old crush jealous?
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