Okay, after reading all of the TL;DR about this couple, I have just one thing to say.

You're free to like or not like whatever you want.

Really, it's okay if you like a specific couple and someone else doesn't. Also, the reverse is true too: it's okay if you don't like something, and someone else does. You don't have to write long essays about why you're right and why the other person is wrong. The only justification you need for how you feel is that's what you like. It's okay for people to feel differently than you.