Committed or obsessed?

Have to do 7 miles on the treadmill tonight. Not exactly looking forward to it, but couldn't get out of a meeting after school today and have to go to Spanish class, so...at least I'm past the point of thinking not working out is an option. I used to obsess about whether I was really committed, whether I'd really made that mental switch to being in shape, whether it could be switched back if I slacked off. Slowly, I'm realizing I am committed, while also realizing that if I must take a day off (tomorrow, for instance), not all will be lost. There's a fine line between healthy obsession and unhealthy obsession. It's a good place to be.