Roommate

So I currently receive food stamps (TX) and I live alone. I will however soon have a roommate, she’s 23 and we do pay our own portion of the bill, but we also eat together as we are friends and are just moving in. When I buy groceries I do buy for the both of us. Would I add her to my case or just leave it alone? If I add her to my case, will my food stamp amount go down or increase or will it stay the same? Edit: we are both college students. I am 20, she’s 23