I was sad for a long time. I've started to be happy again because I've gotten buffer. But I find it troubling that I feel I can only grow happier by changing myself physically. Even now, I look at myself in the mirror and see a whole new person, yet I look within and see the same self-loathing, the same senseless worrying. There's far less of it, but it's not gone entirely.  I've realized no amount of changing myself will fully get rid of these problems. So at what point should I stop trying to correct their faults, and instead just look past them? And how do I "just look past them"?
i think if you take on some new interesting challenges, these problems you mentioned will mostly wash away, while also providing nutrition for your general character. also, relating to fitness, it is always healthy to be fit. physical fitess is good for you mentally also