Will you lose interest to other girls while in love with one?

First, is this problem a life-long problem which is apt to happen during people's life? 
Answer: No. This is just a problem in a people's young age when he has not married yet. But similar problem appears constantly. So rather than evaluating this problem, it makes more sense discussing the rules people use to deal with all problems of this kind.

Second, is this problem of moral nature?
Answer: No. This is a personal problem which could be interpreted as habit. Specificly, people easily get indulgent with other people are apt to follow this routine. 

Thrid, can we get more information about this problem? Specificly, can we know more about how to love?
Answer: Love is shallow, this is what this problem tells us. It shouldn't be regarded as an ultimate goal in life, it is something that is volatile and uncertain. However, the shallowness of love is understandable, just like the understandableness of existence of millions of people on this earth. When dealing with love, it's a suggestion that you act as a normal man/woman as much as you can.

-Self-written
-8:09 PM 12/28/2001
-Classify: Psychological Analysis