Is it permissible for a young man and woman to exchange conversations for reassurance and communication, with the fear of falling into the forbidden, if a formal engagement is currently unfeasible?

The only permissible way for a loving young man and woman to have a relationship is through marriage. If that is not possible, then they must turn away from this attachment and occupy themselves with what benefits them. No relationship between them is permissible, whether through speech or correspondence, as this is a gateway to temptation, corruption, and following the footsteps of Satan.