Married relationship

My husband seem unhappy lately and idk what to do anymore we have 3 kids together and I’m a stay at home mom so I cook I clean and take care of my kids I know have let my self go I know I’m not attractive like I used to be but I just feel horrible we live in the same house and bed together and it’s like I barely know him anymore he’s been very snappy at me and idk why I barely talked to him this week cuz of the way he’s been acting. Every time I try to talk to him he get mad and I just shut up cuz I don’t want get in a fight and I’m not saying anything wrong. Idk what to do anymore I’m thinking about just leaving him.