First, jealousy can definitely destroy friendships. When two people are jealous of each other they become competitive with each other. Jealousy can also make someone feel insecure. If someone is jealous of their friend they might start to look at their friend as being stuck-up or arrogant. There may have been a time as a child when you felt jealous because you believed your best friend wanted to spend more time with someone else. Perhaps in later life you experienced a pang of jealousy when your friend seemed to want to spend more time with her boyfriend than with you. By being jealous, you actually develop a selfish attitude, and sacrifice what may have become your lifelong friendship.
Secondly, anyone who has ever been in a serious relationship has probably felt the green-eyed monster creep into his or her thoughts at one time or another. Jealousy can often make you act out against your