Is it normal to be jealous of your crush?
Yep.Totally normal
Yes, it’s normal to feel jealous when your crush gives someone else attention. The feeling can sting, even though your crush doesn’t owe you exclusivity unless you’re in a relationship together.
A crush can bring up hope, insecurity, and a little “why them?” when you see them flirting or spending time with someone else. That’s a very human reaction, and it doesn’t mean you’re bad or unusually possessive.
The useful line is between feeling jealous and acting as if you have a claim on them. Let yourself feel it, but avoid trying to control who they talk to or treating the other person like a rival. A crush is allowed to be messy in your head; it still doesn’t create an agreement between you.