Go and see you GP as others have said. I went through some big changes in my life 36 months ago and when things did not return to how they were 12 months later I began suffering from depression. I hated everything about my life, i could not go to work, i myself changed and stopped doing things etc etc. Went to see the GP and was given some medication but i decided i myself could battle my way through it, had meetings with my manager at work and talked to him about the situation, they offered me reduced hours for the first few months and at the start of returning to work i could fly with people who were my friends. Now everything is fine, that period of my life has passed.