Jealousy, you know, is usually not an affair of causes. It is much more-how shall I say?-fundamental than that. Based on the knowledge that one's love is not returned. And so one goes on waiting, watching, expecting...that the loved one will turn to someone else.
No form of love is wrong, so long as it is love, and you yourself honour what you are doing. Love has an extraordinary variety of forms! And that is all that there is in life, it seems to me.