If you don’t feel like helping someone please do not do it, let them know you are sorry and can not help them.
Most people help others and keep it in their diary, telling everybody they made this and that for you. With that attitude there is no blessing.
We do mistake thinking the people we help are the same people who will help us, I’m sorry if you think like that your heart will be broken.
In every action is the same reaction, enjoy the attitude of doing good without letting the world know and you will leave life in abundance.