Wow that bigorexia stuff is crazy. I look in the mirror alot but not to obssess or dwell on what I do or don't have. I mostly check to make sure my hair looks fab, haha! I don't obsess over being bigger, getting leaner, not missing a day of stength training or cry about not getting my cardio in.
Don't get me wrong, I am happy on how my body is changing every week and of course I would love to see my abs in better shape or my hams tighter, but I don't think I would call it an obsession, its just become a part of my life. Luckily I haven't skipped a beat in my training, but if I can't make it because I have a more important priority, I don't make it and don't dwell on it. I do miss it but oh well there is always tomorrow.
For me atleast whenever I have felt bad about myself, its mostly because of other personal issues in my life, but not my body. I have felt comfy in my skin, even when I was pregnant and then when I had about 20pds on me that I didn't have prior to pregnancy. Heck, I didn't workout close to 2 years after I gave birth and I still wore tight jeans.
You come to a point where priorities overcome that so called obsession. Everyone is different, nevertheless I am still enjoying the size 6 with a few dimples that of course could be tightened up. But I won't lose sleep or not enjoy a piece of cake if I want to over it.

No way I wanna be a size 4, its too dang skinny for my shape and I don't want to look sickly. If it happens on its own that may call for a bulk..