Being healthy and working is hard

I just recently started my first ever full time job. When I get home I am so exhausted (and sore for some reason?) all I can do is pass out in bed and stare at my phone for like a couple hours then fall asleep. My diet has gone out the window. I used to be cooking all my meals and making sure I ate fruits and veggies and all that and now.....I have just gone back to ordering food all the time because I have no energy to cook and I have started eating garbage snacks as a way to destress.....

I need to break out of this and be healthy again....it is hard when my boyfriend is not helpful. He doesn't really care about health. A lot of days he will complain if I mention wanting to cook because he doesn't feel like it (we cook together) or he just offers to order food. Or he will say "I feel like ice cream, want some??" And it is so hard to turn it down. I have had talks with him before about how this needed to change and he will improve for like a week or 2 kind of then he will go back to how he was.

I know when it comes down to it I will just have to force myself to cook and grocery shop despite my exhaustion and somehow find better ways to deal with my stress than drinking and junk food. It's just way way easier said than done. I also shouldn't let my bf's unwillingness to be healthy or cook affect my choices, and should just do it without him. It just makes things so much easier with his help and it helps with my motivation too.