Half-Baked Sailing

Twenty-five years old, second year of graduate school. I don't know why I want to do this, I don't know what job I should find after graduation, and I can't even control my love life. The circle of friends is full of other people's glamor, and the number of age is like a thorn, the more it is pulled out, the more painful it becomes. At the age of 25, how can I reconcile with this self who has "achieved nothing"?