When Do You Tell the World About Your Relationship

Waje and MI are friends and colleagues, some say they have a romance going on. Waje is a popular Nigerian pop singer, and well loved for her great vocals. She was a guest performer at Darey's Love like a Movie concert [see photos], and also more recently, she hosted MI's Chairman premiere to a global audience on Google+ Hangout.

When asked in a recent interview about that role, she said, "I bond well with MI, and the whole Chocolate City family, so people assume I am an artiste under that label, but it is not so." Her response when the interviewer probed further on rumors of a possible romance gave rise to the title of this post;

Don’t you think MI likes you? I saw his Tweet where MI complained that you had “brother zoned” him.
(laughs) Leave him a beg, he is not serious, we are just friends. Even if we are dating, is it something I would tell the world?

Now, I don't know if Waje and MI are dating or not, but what I'm curious about is this - when do you tell the world about your relationship? Is it a time thing, or a status or seriousness thing? Time, as in 3 months, 6 months, a year? Or status, like it's complicated, exclusive, etc? Do you only tell when you get engaged, or even when you get married?