<human>: I'm suffering from depression. I'm making a major career transition with six-figure student loan debt and no steady source of income yet.

My gf is a 19-yr-old university student and also suffers from depression. 

The time we've spent together has been terrific and she's helped me feel a bit happier about being alive; I've helped her during some of her biggest emotional spirals, just being there to be supportive and trying to give as much or little physical/emotional support as she wanted.

Lately it's been really hard to find the energy to be the support she needs during her episodes. She's juggling school, a part-time job, and dance practices (we both dance, but not in the same groups). She's doing the part-time job for fun, so it's not because of financial reasons, so she can quit whenever. 

She has these emotional episodes when she feels stressed out from all the things she has to do, and I try to be supportive. When she gets stressed, she also binges on sugar, mostly in the form of soda and fast food. She's a tiny girl (barely 100 pounds and a little over 5 feet tall), and I worry about her future health, especially because my family's dealt with diabetes and her family also has a history of diabetes. She insists the soda is the only thing at that moment will make her feel better, and I don't know how to tell her no because we've had a big argument about food/drink before. She felt I was trying to control her diet and cared too much about her looks, even though I honestly only care about her short-term and long-term health. I know that soda and sugar don't help with regulating moods and, if anything, can often make things worse. It also doesn't help that she starts feeling depressed when we're apart for more than one day at a time.

Give me a shortened version of the text
<bot>: How can I as a busy-with-work and depressed person continue being supportive of my depressed gf who makes horrible food/drink choices when she's feeling down and we're apart?