Yep, I've had that struggle and still struggle with it. I don't have answers really, more like suggestions. I see it as letting myself feel the grief, the anxiety, whatever the emotion -- instead of trying to stuff it down. It may seem unbearable and scary and overwhelming. That is usually momentary. The worst will pass and you will be ok and able to handle it.
And there are ways to alleviate the uncomfortableness the emotions can lead to that make you eat, the way others here have mentioned. Turn to friends to talk, or relatives, counselors; journaling/writing. Creative outlets: poetry, writing, painting, dancing. Exercise, physical activity. Even being a part of a group, a church group, volunteer group, activity group (knitting, reading, whatever interest), can be a good way to gain support.
Go out and discover places and things and people around you, art and/or nature.
and remember that you're a strong person, with the ability to handle a whole bunch of stuff, and when you struggle, you know how to use your resources to get the help you need
