Love sometimes is so confusing

Isn't it strange that all of a sudden the person you have loved for ages, is somewhat of the second priority to the one who just entered your life. Does that make us a "cheater" or a humanbeing who just can't control his or her urges?

I believe a person changes from time to time, but what makes life so complicated is when you really have the element of guilt within you. So "lucky" are those people if i may call them that who can just get away with loving people and not thinking about someone's feeling. But then again they are not that much of a human for that are they? That's probably the difference between us humans and animals that when we do something which we aren't supposed to, we feel the guilt. And thats how it should be, the element of guilt should be so high in a person to not be trying his "luck" on others on someone else's expense...............