I'm 26 and was just diagnosed last week. I have been thinking of seeing a doctor for, oh, I'd say 26 years now. I've been more serious about it this last year thought. I had a very bad sleep week a month ago that ended in a very upsetting/hopeless morning, so I went to the doctor. Unfortunately I have no insurance, so I'm going to the county clinic that opperates on a sliding scale (you pay based on your income) for all "first respons" treatment (anything easy). Because of this it took a month to get an appointment, but in the end I made it and it worked out.
What finally made me go was complicated, but it was a mix of a realization that I could never have a healthy relationship if I didnt get help, and a very hard hitting depression that I needed out of. To be honest, when I went into the doc to make the appointment, all I wanted was sleeping pills. Over the month of waiting, I realized that I needed to deal with the problems causing my insomnia, so, now I'm here!