Even if you decide to stay in, go to a little effort to make it special. For example, if you're watching a movie on Netflix, pop some popcorn and put plenty of blankets and pillows on the couch so the two of you can cuddle up.
Touch each others more. You might hug, kiss, hold hands, and snuggle. Incorporate these moments of intimacy into your day. Additionally, talk to each other more to grow closer emotionally.