I will never, ever tell anyone to make all the details of their personal life public, but there are some exceptions.

In almost any article on relationships you see one thing over and over- if your partner is really serious they will make your relationship known to others.

Yes, there WILL be some evidence of this relationship somewhere. They might take you out on dates, introduce you to their peeps and all that. With all the computer stuff that we have now, a picture of you or both of you might show up on their Whatsapp, Facebook, Twitter...

A 'public statement' is his or her way of saying, "Yes, I know I am cute but I am taken. No thanks!"

When a man or woman is reluctant to acknowledge their relationship with you you better take warning.  Most likely they running a game on your or on someone else. Long story short you might want to think twice about how committed you become to this person and to the relationship.

 Like I said before you do not make public every detail of your dating life, but if someone is serious about you they will let others know.

Guard your hearts against players and playettes.