Loneliness
This is paired up with not having found a job yet and having recently graduated, so I spend the day mostly alone with my thoughts and they go in unhealthy directions if I can't distract myself, self reflecting on why people must not find me interesting enough to talk to, or telling myself that people who haven't been able to find time for me (but have for other people) don't care about me anymore...
And no one I talk to knows how to help. I guess that's why it's leaking over here.