A lover, who claims to love, can never hurt his/her beloved. Love demands that you care utmost for your beloved. You are concerned about their feelings. You make them as comfortable as possible. You keep them as happy as possible. You help them fulfill their dreams. You encourage them during tough times and you are always there for them. If you don't do this, there will be nothing called as love. The definition of love includes the qualities I mentioned.
This does happen. In many relationships it happens all through the life. Such couples need not worry to know about heaven. Their home is heaven. But in some relationships, if a lover wishes to break away for any reason including feelings of being treated unjust, the results will be harrowing.
Let us look at what will happen. As the lover who wishes to break away remembers all the investments she/he did for the love, she will feel that all has gone waste. All my sacrifices are in vain. I did so much for many years, and now what is the result? This frustration and anger is directed towards the partner. At that time the lover who is breaking away forgets that worse will happen to one she /he will be leaving. Only selfish thoughts occupy the mind.
This is the tragedy of such love. The one who is left behind might have made more sacrifices and given a lot more for love. He/she gets bewildered at why this break up is happening? It is like a sudden earthquake. That is why I asked, that if you love someone why hurt?