I'm going to ruin Valentine's Day by not watching a romantic comedy.
Do you hate the comedies?
You might find this hard to believe, but they all suck.
I understand that it can be annoying to do something that you don't enjoy, but you shouldn't intentionally ruin a holiday for someone else. If your partner really wants to watch a romantic comedy, you should spend the couple hours and watch it with them. Otherwise, you risk the chance of them feeling like you don't care about them or the relationship.
I will do what I want!
It might end up ruining the day for yourself as well. I think that you should just watch the movie, it is probably going to make their day if you do.