I'm struggling with something inane and I'm wondering if it's normal or not. Please be honest. I'm open to all thoughts and opinions.

I had a really intense (unhealthy) relationship with a guy for about a year and a half. We were dating but he didn't want a relationship, blah blah blah. I finally cut the cord a few months ago, and haven't spoken to him since. Here's the thing. We live in New England and, as a result, much of last winter resulted in us cuddling on the couch and watching various shows on Netflix together. We went away for a long weekend in February and spent the whole time in bed fooling around and watching Downtown Abbey. So it's a year later, and I can't bring myself to continue watching the shows we used to watch together (including DA) because it brings up too many painful memories of us watching the shows together and sharing ongoing inside jokes about said shows. Is this normal? Or am I being overly sensitive and ridiculous? I know this is a stupid problem, but it's honesty the last lingering issue I have regarding the ex. So I guess I just wanted to get it out there and see what people have to say. Thanks!