I know you miss GF, but you have to keep eating correctly. You need to keep your strength up. I understand how hard it is to cook for one. I really do.. but not now.. You have a mountain to hike..i have stuff i can cook steaks and the like just got zero motivation to cook with gf gone right now
Just think how GF would feel, once she comes out of isolation, to find you not eating well !! She would be furious at you!! and disappointed.
Do it for GF.. do it for your own sake..
Please..