How do I determine what friends to invite and leave off the guest list during covid?

I have had chronic health issues since 2013, after being diagnosed with breast cancer. I had to have implants after mastectomy and have had health issues ever since. I mostly stay in contact with my friends on social media but don't hang out with most of them in person, especially since covid. I have a long time friend that used to invite us to her events but stopped a few years ago. We still run into each other and she has asked when my wedding is and she knows my fiance, as they used to work together as managers for a retail pharmacy. Her kids and my son grew up around each other but I'm not sure if they should be on the guest list or not? She always says she misses us and we need to hang out but it never happens. I'm just not sure how to decide who we should include or not include and we are trying to stay within our budget AND keep up with social distancing during this pandemic.