Boyfriends parents two-faced

So my boyfriend and I lived with his parents for a little over a year. Instead of paying them rent they wanted us to do chores and pay their cable bill. (And my boyfriend had to pay for his car insurance too, he's on their plan or under their name or however it works...I don't have a car so I don't know lol) but no matter how much we cleaned, how much we took care of their dogs, or how many times we bought food and cooked them nice dinners they would always bitched and complained about how we supposedly "never did anything".
My boyfriend would talk to them about it and I would be in the other room and could hear them say how much they didn't want me at their house and how I don't do anything (which was untrue because I did 90% of the cleaning and chores. They're just such slobs nothing stayed clean for more than a couple hours) but then whenever I was around they would always say things like "oh thank you so much for doing all this stuff for us." "We really appreciate it"  " you're just like family to us" ...my boyfriend and I are nowoved into our own apartment and I guess a few days before we moved out my boyfriends dad told him the of he ever wanted to come back he's more than welcome but I'm never to set foot in their house again and they don't want me there. He yelled at him for saying that but I'm just really upset and it hurts my feelings. Like I did so much for them and if they really dont like me that's how & wanted me gone so badly why could they just say it to my face instead of lying about it