You are clearly a very giving and trusting person. YOU did nothing wrong. It hurts when someone you care about leaves, but it happens to everyone. You are not alone and like others who have gotten over heartbreak so will you. For the future.. 600$ is WAY too much for a gift, especially at your age. I don't know how long you were together but you need to be careful of being taken advantage of because of your generosity. People will love you for your personality, your kindness, your attention. You do not need to buy things for people. Take this pain and learn the lesson to not let people take advantage of you or use you again. This hurts. but you will be stronger because of it. He was the jerk for using you- you are not trash. he is.