I worked freelance for a number of years and I found that I am the same as you; I miss the social interactions.

Since I had no options to work in an office - I didn't have one - I decided to start working in a co-working space.

The co-working space cost me money I would otherwise not have spent but the impact on my mental health was great. I got a regular group of "colleagues" and it clearly divided my home life and work life.

I would definitely recommend it once we're all out of lockdown.