Hey adsims,
It's a big site with a lot of different forums, but as you'll see not everyone is on at once or posting on every forum. But, as you stick around and read, you'll learn more about this journey of weight loss.
I am like you in a lot of ways. I used to be very active--I was studying martial arts at one time--and then as I gained weight, I couldn't take the falls, so I stopped doing martial arts, figuring I'd start again when I lost a few pounds. Well, that was 20 years ago, and it's no longer a matter of "a few pounds." I'll probably not do martial arts again, but I would like to at least reach a weight where I could have!
Anyway, sounds like you need consistency. Perhaps there are reasons that you stop yourself? In terms of 1 week at the gym and then sit on the couch. I don't know--just something to think about.
Good luck! See you around here...
Jay