is it possible in unity where you can connect with a friend and work with a game
together then by yourself?
This doesn’t belong in this section, And you can use Skype, a lot of people use it.
dose skype make you screen share?
No you can choose to
If you and your friend want to work on the same game, then you could try Dropbox. Create a Folder in the main core (where the Public folder is), share the folder with your friend and off you go.