Is hard to end a friendship, but sometimes you just need to accept it and do it. It's hard and sad, but it's the best thing. After a while, you learn to realize when a friend is not the good kind before stuff like the one in the story below happens. You learn to notice the signs. To realize when a friend is actually just an entitled person who loves to use people for their own benefit. And those people should be as far away from you as physically possible. They don't deserve your time, let alone your friendship.
Cutting ties is extremely important when someone is using you. This person who has wronged you will do it again. To avoid it, you will have to be the bad guy and cut any form of link you two have. End the friendship! There is no need for you to maintain a relationship with someone who is so entitled that they only see you for the benefits you can provide to them. Better friends are out there, trust me. Ditch the bed ones!