Yes, it sucks getting older. I've always been on the thinner side and people always told me "when you hit 30 your metabolism slows down". Well, they weren't kidding. The exact year I turned 30 is when it changed. Although, my lifestyle also changed around that same time. I got a boyfriend, changed careers and moved.
You are still 5 years away from 30 so don't let it sneak up on you. I know I can lose the weight, it's just a matter of getting off my lazy a$$ and doing it. But recent events have changed the way I'm thinking so hopefully I'll be boarding the right train here soon.

Good luck to you, as I'm sure you can get back in shape without any problems. Find a physical activity you like and stick with it.