Jealousy as it is
First of all we should say that jealousy is a feeling. As you know jealousy is a mass destructive feeling as it is able to ruin everything on its way. Once jealousy got into your heart there will be no peace in it and there also will be no other feelings except jealousy. Jealousy is provided with magic ability to occupy the whole heart and soul and so there is no place for other feelings. But it is important to know what jealousy is. Sure, everyone has its own explanation but there are also explanations given by people who know a bit more then we do.
Those people, as usual, are psychologists. They always deal with different troubles and phenomena of psychological nature. They are people who help us to deal with our worries and settle our conflicts. So, according to psychology jealousy is not an indication of love but the indication of fear. They say that jealousy appears as a result of feeling of authority. One person feels that he or she has an authority and power to control another person. These feelings are common almost for everyone. So, once a person is possessed with these feelings the fear of the authority loss comes inevitably.
And once that feeling comes jealousy appears. As you can see this feeling has nothing to do with love, but with the desire to control someone and fear for loss of this control. Unlike the common opinion jealousy has nothing to do with an all-absorbing feeling. It is not a desire to keep someone as a property and let no one touch the object or talk to it. It is a fear of loss of the object. A person feels the control over another person and he or she is afraid that some day this person will be out of control and there nothing that could be done.
As you can see jealousy is a problem of the one who is jealous. This problem has nothing to do with one who is being jealoused. But it is a theory and the practice is extremely different. Sure, there is no your fault that a person you are in love with is jealous but there are problems caused by that jealousy for you and if there are such problems jealousy is a problem of both.
Jealousy is also based on the on the lack of self-confidence of the one who is jealous. It is a fear of being not good enough, not smart or young enough. There are a number of different not-enoughs but all of them are of the same idea and that idea is a lack of self-confidence. So, jealousy has nothing to do with love. If a person you are in love with is jealous you can't take it as an argument to weight existence of his or her love. The reveal of jealousy is an indication of the lack of self-confidence and fear for loss of control over the one a person is in love with. But, this feeling will never be an indication of love. Love has nothing to do with fear and aggression.