Hi Kerry,
Seems like the existiong blog post from diningfriender.com is created from guest user an 1 user (superuser) where it make easier for this process where you can simply follow the method:
https://stackideas.com/docs/easyblog/administrators/migrations/migrating-easyblog-to-different-site
by
1. uninstall Easyblog and delete all the esayblog table from database eventfriender
2. export all the EasyBlog table(diningfriender) then import into eventfriender database
3. install EasyBlog in eventfriender
5. need to run some of the SQL query to update all the existing blog post author id to your existing new site author id (if that is different author id)
Or you can try find a user migration tool from
https://extensions.joomla.org/category/migration-a-conversion/users-import-a-export/ and see whether can use this 3rd party tool to migrate all of your user data from diningfriender site to new site eventfriender.
there are many relationship between easyblog and easysocial ?
-> There is few relationships between EasyBlog and EasySocial which is user id where it was referring to the same user id with Joomla's and blog post id where when there is some stream item was generated it will refer the blog post id (where must be in sync)
Hope this helps.