Can I stop watching a series with my partner when it has become our weekly ritual?

My partner paused episode seven and said, 'You used to have theories. Now you're checking how long is left.' I was. There were twenty-three minutes.

We've spent Friday evenings watching a drama for almost two months. He makes popcorn, I choose dinner, and for the first few weeks we argued cheerfully about which character was lying. Now the story keeps returning to a relationship I don't care about. He's more invested than ever.

I pay $14 a month for the streaming service we subscribed to for this show. The next payment is due after this week's episode, and I was going to stop paying because I don't use it for anything else. When I mentioned it, he offered to cover the next month. That solves the bill, but I'd still be sitting through a show I'm no longer enjoying.

I'd happily keep Friday dinner and watch something shorter afterward. He says switching things now would spoil the one routine we've managed to keep. How do I separate wanting time with him from wanting to finish this series?

The service and price are illustrative.