Am I in the wrong?

I am getting so fed up that I cannot enjoy my family just the four us and this pregnancy comfortably. I asked my boyfriend can we go food shopping after I pick the kids up from daycare and he agreed. I came back to the house to pick him up after since he just got in and wanted to get a little rest. On our way to the store, he told me I can’t do a big food shopping because our freezer and refrigerator was already full. I then responded, “it’s a shame I can’t put food in our own house” and he told me I was selfish for that comment and he was very upset and didn’t know how to respond to it. Since we’ve gotten a place of our own his mother and little brother has been living with us. We first had a two bedroom house that we moved out of because we were on baby number two and there was limited space with them there as well. We ended up talking to our landlord and she took over the place. Fast forward we moved into a bigger house. She was complaining about how she couldn’t pay her bills and he let her move in with us again. She has had 7 brain aneurisms and get a social security check for herself and her other other son plus his ssi check on top of that. Her health has increased magnificently and she’s allowed to work no more than 30 hours a week, but she chooses not to find a job.

I miss having my house to myself. I miss not having to worry about hiding my kids food and snacks because someone always end up eating them. I miss not having to do extra cleaning because we like our house in a certain order and people can’t follow our rules.