Ask yourself these simple questions:
Is this feeling interfering with my normal life?
Is my jealousy hurting someone I love?
Does my jealousy control me more than I control it?
If the answer is yes to any of these questions, then you may consider seeking help.
Jealousy is an emotion and typically refers to the negative thoughts and frustrated feelings of insecurity, fear, and anxiety over an anticipated loss of something that the person values, particularly in reference to a human connection. Jealousy often consists of a combination of presenting emotions such as anger, resentment, inadequacy, helplessness and disgust. Wikipedia