Friendship...

There is a group of friends.
One of them is very excited and said to their friends
See  I bought a new cell phone.
Second friend told him Wow come on you have to give party to all of us.
First friend is little  worried because he don't have  enough money to give party Although he decided to give party.
In evening they went to a hotel he gave grand party to his friends.
After completion of dinner his friends asked to him how did you arrange so much money for the party.
Then his friends came to know that he sold his cell phone.
His friends asked to him how he did like this?
he answered How can I be happy without you being happy?
His friend hugged him and said that "You idiot I knew you would do something like this.That's why I bought back the cell.Here is you gift"