Marriage going down hill

My father in law is completely coming between my husband and I my husband let him disrespect me over and over again I’m to the point I want out my father in law live with us was only been for a couple of months that turn into a year I can’t do this anymore I talk to my husband about it and he just says he have a lot on his mind I told him either his dad leave are I will leave smh I’m to the point where I would rather be alone than be and this mess his father in law was on drugs really bad and lost his wife n etc that’s the reason he move in with us a year ago I’m fed up on top of that he’s jealous of my 7 year old son saying I treat my 7 year old better than my three year old nah I treat them the same he just don’t like to see me get on to my three year old because she’s his grandchild by dna my son is not I plan on leaving smh needed to just vent and some advice and opinions also his dad being trying to get rid of me since 2015 believe it are not his dad was happy for him to marry me but now it’s Ike he want his son to himself and imma give him just that