Hi! I can relate to you! I’m also a tween and I really miss my friends too! I have some suggestions that helped me:
See if you can start a group of kids that you can play outside with weekly or daily! (Try friends you don’t really know!)
Create a zoom group chat monthly or every week
You can always ask your teacher if they could create a time when kids can just talk to each other weekly
Join a club like scouts or a book club!
Keep posting on this wonderful place at KS!
You can try this cool calming website too! Link: https://www.pixelthoughts.co/
Here are some cute pictures to look at as well: https://unsplash.com/s/photos/calm
And the best thing to do is to remember We will get through this and you are not alone. Hope this helped