I felt alot of those things in my early-mid twenties. When I was 25, I had already been at my job for 6 years--most of my friends were still in college, traveling on mom and dad's money, or slinging coffee. I felt really old, like I was missing out on a lot. I worked 50 hours a week (or more) and my vacation times were restricted between publishing seasons.

Anyways, I easily solved my problem by becoming a mentor through the Journey Program. It's for kids that are coming out of jail. I had to spend at least 4 hours a week with her for an entire year.

Once I started focusing on someone other than myself, I snapped right out of my funk.

I think its really easy when you're young and single to become completely self-obsessed. Which, in my opinion, is a big factor in the "quarter and mid-life crisis".