Life is a (personal) journey.
Only the individual knows if they (want) to be in a relationship.
Naturally one's circumstances have a lot to do with it as well. If your primary focus is getting an education or establishing a career you may not have time for anything "serious" or beyond casual dating.
As you noted "in this cyber age": one can have "friends with benefits" or simply be out to have fun! Not everyone is looking to "settle down" or find "Mr. or Ms. Right" Sometimes "Mr. or Ms. Right Now" works.
This is especially true if a person is in their late teens or in their 20s. Those are pretty much the exploratory years to figure out who (you) are and what it is you want out of life. Until you figure that out you're likely to allow "impulsive connections" and "happenstance" to dictate your relationship choices. That's like going shopping without a list!
Choosing the "wrong mate" can sabotage one's life in many ways.
There are always going to be folks who are married or in a long-term relationship that miss being single and there will always be single people who wish they were in a relationship or married.
All that matters is knowing what (you) want!
Know yourself, Love yourself, Trust yourself!