Well... my situation is so much different than yours that I really would not be able to relate. (I'm an older person & pretty reclusive by choice.) But what occurs to me, with regard to your post, is that perhaps this is primarily change-related anxiety? You've been used to working until 8 pm. Now you're going to have evenings free. It can take time to adjust to new life circumstances. So perhaps it's simply going to take some time to get used to the new schedule? One thing I would think might be important is to share how you're feeling with your bf so that he understands what's going on. Here are links to 5 articles, from PC's archives, on the subject of embracing change:

Adapting to Change

Why Embracing Change is Good For You | NLP Discoveries

5 Effortless Ways to Embrace Change

Making Room for Change

7 Tips on Mastering Change