If a person desires something, he will usually take steps to appropriate it to himself.
God desires something, and He took steps so that His desire can come to pass.
A person can desire that a particular person will fall in love with them, but he cannot make it happen.
Because God loves people, He desires that people become saved. He made it possible for people to live with Him forever. God wants everyone to be saved so they can live with Him forever, but He cannot make it happen.
He gave people free will, and He honors people's choices.