Was my crush actually showing jealousy over me?

I was at work one day and just checking people out like I normally do because I’m a cashier. I’m 20 and I get frequently that I’m pretty. Often from teenage girls. That one day my crush happened to be at the register next to me and we always give each other a hard time jokingly. There were a group of girls who I was checking out at the register and they started snickering and I ignored them. Then I heard them go “you’re so pretty” and I looked up and they were looking at me so I said thank you and said they were too. My crush never looked up from the register as then went on but afterwards she was like “that was nice Jordan”.
I told her that it happens to me a lot and I called the girls pretty back because they were pretty and she told me to just take the compliment. Lol could she have been a little jealous. She’s told me she cares about me and stuff and has tried to keep me from talking to another guy.
Was my crush actually showing jealousy over me?
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