I compare my life to others all the time. I'd like to blame it on the fact that I'm a teenage girl, and we're just supposed to do that, but I know that's not it.
It's because I'm partially insecure, partially jealous and partially really competitive. Sometimes I think I'm doing something wrong, or I'm just unhappy and I have to look around and wonder why other people aren't the same. I don't want to feel different, so I'm constantly comparing myself to make sure I don't look like a freak. If the root is jealousy, it's because someone is something I'm not, and they get positive perks (attention, compliments) that I want.
If the reason is competitive, it probably stems from insecurity and jealousy together. I don't want to be last- I want to be first. I want to blend in, but I want to have an edge and be a cut above everyone else. I'm constantly comparing my accolades and accomplishments to others' lives to be sure that I'm ahead of them.
That's just why I compare my life to other people's lives. Most of the time I'm pretty pleased with the way my life is working out, though. I'm not generally the manic type.