Can someone be possess with the spirit of Jealousy?
I do not think it is a spirit but a decision.
Yes, anyone can get jealous but it is up to you to decide whether or not to remain so.
For instance, I used to get freaking jealous when my boyfriend talks to other girls. Crazy isn't it? I mean, how in the earth was it possible not to talk to other girls? He wasn't cheating, NO, but I wanted him to talk to just me. I was being possessive. He used to heed until he came to the realization that it wasn't fair and he talked to me about it, I had to sit back and think about it, realizing that I was being possessive, I resolved to stop and started telling myself that he was free to talk to anyone and I was completely fine with it.
Though it didn't come easy, but with time, I accepted that fact and I stopped getting jealous about it.