When Jealously shows its face, it’s always ugly, very ugly.
I think for some , they can’t deal with their own inadequacy. It stems from insecurity and low self-esteem. They feel that they aren’t good enough, or worthy of you love and attention. These feelings only fester and eventually they manifest into stronger and more violent emotions likes anger, and hate.
Their own insecurity or bad self-image makes them think badly of themselves, if this person is in a relationship they begin to wonder what their significant other sees in them. They will second guess themselves on why their sig. other will stay with them or leave, and of course they fear that their sig. other will find some one who is “better”.
You should remove yourself from the jealousy types. Relationships with these types of people are unhealthy.
Soon you will find yourself conforming to behaviors, that only have been approved by your Jealousy Other half. When you have to 2nd guess your actions, words, thoughts, in order to avoid the slightly rise in jealousy, I think you reevaluate your relationship. When having lunch with a friend becomes an interrogation, when a night out with the boys/girls become more of a chore than enjoyment, when much needed alone time is questioned, I think it’s time to ask yourself this question; Is this how you want to live?
Of course, communication is the key, but when that fails and it can’t be worked out…RUNNNNNNNNNNNNNNNN