"Wifey things"

If me and my boyfriend have been together longer than 6 months and I don't live there but spend every night there do I have to make dinner all the time? Again, I don't live there, only have a few things here (like shower stuff, a towel, and some lotion) but I haven't slept at my house in 5 months. I feel guilty for not cooking dinner all the time, like tonight I was going to make something but didn't feel like it, so we are going to chipotle. I don't want to do all these "wifey" things like make dinner every night with the title of just a girlfriend. Especially not fully living here. Is that wrong?