Getting bored

Im getting bored in my relationship. SO and I always do the same thing everyday. Its like we dont even try anymore were so use to each other. Coming up on being together 6 yrs and its like we havent done anything for ourselves. We havent gone out in a long time. Our sex lives is nothing but quickies because our kids always knocking on the door (we share a room we currently live in my moms house). Idk what to do and when i talk to him about it he says its just money not enough. I get that but seriously feels like our relationship has been in a rut.