Loneliness and feeling unloved, looked over, passed over, not 'enough' for the one you wanted and loved can, indeed, make us comfort eat. You know what -- put on some lovely music like this and listen and cry, instead.
You're not alone. It actually happens to the best of us. We're just more sensitive and loving people.
I'm glad I'm such a sap. And I'm grateful for the loves I've lost. They still sting, but they've made me that much more thankful and joyful with the love I've found.