Yes I can totally relate, although I'm not sure how much help I can be.

T says I do it as a form of self harm to stop the overwhleming feelings. Apparently people who binge on carbs etc use them to alleviate the constant pain and hurt we carry around. People who binge on chocolate, cakes, crisps etc use them to control an immediate emotion, like an arguement you've just had or after a stressfu day. Unfortunately I do both, SI and spend to excess so things dont look great, and nothing I try ever seems to stop the pain, but adds to it.

I had a session today about using better coping skills like "radical acceptance" which is accepting you feel an emotion and not trying to punish yourself for feeling like it but being kind to yourself and taking a bubble bath or reading a magazine or taking a walk, or whatever else you enjoy- basically giving yourself a treat. Which sounds do-able in principle, but I need INSTANT relief because the pain is just too much to bear, so I revert back to my bad coping skills.

When I feel depressed I really do find that being outside in the fresh air, among other people does help even if it's just for a few minutes, but I know it's easier said than done and most of the time I want to hide away from the world.