It is not great to help a person who helped you but it is really great if you help a person who never helped even harmed you also. You are losing an enemy by doing this but you are gaining a friend. This should be kept in mind always and work towards having more and more friends than having enemies.
Of course people say, a wise enemy is better than a foolish friend
Further, I humbly request the author not to use sms words like 'ur', etc. Please write proper words and sentences.
"If you are killed in action, you go to Heaven. If you win, you rule this Earth (as beautiful as Heaven). That is why, O son of Kunti, take a firm resolve and fight!"-- Shrimad Bhagwad Gita
Thoughts exchanged is knowledge gained.
Among friends, it's possible to have a disagreement or a discord related to views, money and common love interests. This is inevitable but what is important here is to clear the frosty lines of communication and have a frank discussion to quickly get back to normality.
As far as enemies go, if the circumstances change and the person changes, we can give him a chance and be cautious.