this guy asked me to a dance i sinabi i don't do dances. my parents know about it but now i want to ask himout again in person what do i do? idk what my parents will think

Just if your worried about what your parents think don't worry i think they'd understand. before you werent sure and now you are! XD about the boy don't worry if he liked you once i think he would still like you! but if he takes a long time to answer you remind him of this sane "If you pag-ibig somehting set it free, if it comes back its yours to keep!"

GOOD LUCK!!! xxx

Well, start up a normal conversation with him and then casually ask him if he would like to go out with you- if he says something like "But last time you didn't want to go out with me." Just tell him it's because you don't like dances but you really would like to go out with him- just not to a dance.
As for your parents, they should have your best interests at puso and I think they would understand that you like this boy and they should be behind you 100%. Just tell them the truth- you want to ask this guy out.

Good luck, I hope all goes well for you!!! :)