Question for the single mommies...

To make a long story short, I am thinking of separating a while from my husband. We have 7 kids together and he works, I'm a sahm but when at home he does nothing. He either sits on the couch or plays video games. I take care of EVERYTHING and do most of it one handed since our youngest is 10 months. If I put him down I can't watch him while I fold laundry or bathe the 2 year old or do homework with the 6&8 year olds or any of the other hundreds of things I'm trying to do in the evenings. He doesnt even make sure I have eaten before he gets seconds. So usually my dinner is cereal or a pb&j bc he didn't put a plate aside for me. I just feel so unappreciated and unloved. I feel single already. Do you think I could manage in this economy financially with 7? My mom says to suck it up because I won't make it without him financially. My grandfather left me the house, it was in my name before our marriage so I dont have rent or mortgage but still there is food and bills to be bought and household items and things the kids need. I just want to separate but I don't know if I should or just deal with it. And yes I have tried to talk to my husband and his only response is "at least I'm here and not out cheating." He might as well be because he's not here helping. 🥴