Welcome, Kelly!
We're so glad to have you join us.
Your story is very familiar.
When my husband and I started dating, we both gained weight. We've been married for 20 years. Sometimes we're slim, but mostly lately we're not!
I'd really recommend making some changes in your eating patterns... even a few small ones to start. And plan. Planning is everything, particularly when you're so busy.
What about sitting down with your BF for a few minutes once a week to plan your meals? Healthy foods that you'll both enjoy without feeling deprived. There are many great freezer recipes online. It's not difficult to whip up a couple of meals (doubling or tripling them, or whatever) on a day off, divide them into portions, and freeze them for the coming week.
And if you know you'll just grab from the fridge when you get home (I hear ya), make sure you've got some healthy stuff in there. Stuff that will appeal to you.
Your best bet is to make changes that will become habit-forming. Changes you can live with for the rest of your life.