By now he probably finds it all unbearable to deal with and he just doesn't feel comfortable being in your parent's house while you, yourself, are not comfortable. So, unless that dynamic changes then I don't see why he'd ever look forward to it and he likely can't give you a straight answer because you are pushy and do not take no for an answer.

If you do want to reiterate it, then by all means but be sure to carry that same energy for your parents.