Jealousy

I wish there was no human need for it. It quite possibly may be the worst feeling aside from heartache. Especially when you have absolutely nothing to be jealous of. When you know the person you have loves you. When you know that any conversation that person has with another person is purely innocent on their end.

So why do I get jealous? Because the person talks to other people? Because the person can connect with others besides me? Because the person is friends with people who happen to have crushes on the person? What's wrong with me? How could I feel this type of petty jealousy? Is it really just part of being human, or is my head just fucked up? How can I stop?