Do people know or feel when they are jealous?

Question

of other ppl, for example some ppl just dont like ppl but to start trouble with a person for no reason and everybody saying it's jealousy why dont I buy that jealousy c**p. (girl at my job, hate me for NO REASON!!! I THINK)

Is jealousy/envy really real, and do you think ppl will ever get over it or would it stay with a person as long as they around that person like say if someone jealous of you at work or school wont they be jealous the whole time you there.

Answer 1

when im jealos i sortta get mad at the person but try to hide it

Answer 2

You know if your jealous when you just get this weird feeling right about were your heart is. sometimes it feels fluttery.

but maybe its different for some people.