Well I can only Express a personal opinion. In my understanding, love is when you want to give the person your all, all my care, warmth, if only he was well. I think true love can be once. In relations between a man and a woman should be and the passion and storm of emotions, should care about each other,and the main thing in relations a sense of harmony. To obtain this harmony, we must be able to listen to your partner, to make concessions, in short, need not to be selfish but to share the opinion of their loved one.